Purchase price Proceeds from Divestiture of Businesses Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] Range [Domain] Statistical Measurement [Domain] Property and equipment Property and equipment, net Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment Letter of Credit Fee Line of Credit Facility, Letter of Credit Fee Percentage Line of Credit Facility, Letter of Credit Fee Percentage Award Timing Predetermined Award Timing Predetermined [Flag] 2026 (six months remaining) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Related Party Transaction [Axis] Related Party Transaction [Axis] Cost Intangible Assets, Gross (Excluding Goodwill) Indefinite-lived Intangible Assets [Axis] Indefinite-Lived Intangible Assets [Axis] Entity File Number Entity File Number Additional Paid-In Capital Additional Paid-in Capital [Member] Equity [Line Items] Equity [Line Items] Equity [Line Items] Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Basic net income per share: Basic net loss per share: Earnings Per Share, Basic [Abstract] Schedule of Long-term Liabilities Other Noncurrent Liabilities [Table Text Block] Distributions to non-controlling interest holders Adjustments to Accrued Distributions to Non-controlling Interest Holders Adjustments to Accrued Distributions to Non-controlling Interest Holders Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Operating Activities [Axis] Operating Activities [Axis] Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Schedule of Disposal Groups, Including Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Interest expense Interest Income (Expense), Nonoperating Equity [Table] Equity [Table] Equity [Table] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic net income per share (in USD per share) Earnings Per Share, Basic Warrants outstanding ( in shares) Class of Warrant or Right, Outstanding Federal Funds Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Escrow liabilities — current portion Escrow Liabilities, Current Escrow Liabilities, Current Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Net loss from discontinued operations attributable to non-controlling interest Net loss from discontinued operations attributed to non-controlling interest Less: Net loss attributable to non-controlling interest Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest Greater than 2.00 to 1.00 Debt Instrument Leverage Ratio Four [Member] Debt Instrument Leverage Ratio Four Accounts payable Increase (Decrease) in Accounts Payable, Trade Deferred tax asset recognized Deferred Tax Assets, Gross Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Schedule of Reportable Segment Operating Performance Schedule of Segment Reporting Information, by Segment [Table Text Block] Diluted (in USD per share) Diluted net (loss) income per share (in USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Contract with Customer, Liability [Roll Forward] Contract with Customer, Liability [Roll Forward] Contract with Customer, Liability Intangible Asset, Indefinite-Lived [Table] Intangible Asset, Indefinite-Lived [Table] Continuing Operations Continuing Operations [Member] SOFR plus 1% SOFR plus 1% [Member] SOFR plus 1% Operating lease liabilities Increase (Decrease) In Operating Lease Liabilities Increase (Decrease) In Operating Lease Liabilities Adjustment to Compensation, Amount Adjustment to Compensation Amount Other assets Increase (Decrease) in Other Operating Assets Principles of Consolidation Consolidation, Policy [Policy Text Block] Equity-based compensation Share-Based Payment Arrangement, Noncash Expense August 2024 Repurchase Program August 2024 Repurchase Program [Member] August 2024 Repurchase Program Indefinite-Lived Intangible Assets [Line Items] Indefinite-Lived Intangible Assets [Line Items] Continuing Equity Owners Continuing Equity Owners [Member] Continuing Equity Owners Stock options Employee Stock Option Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Excise taxes accrued on share repurchases Share Repurchase Program, Excise Tax Cash paid for income taxes, net of refunds Income Taxes Paid Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total stockholders' equity Equity, Attributable to Parent Insider Trading Policies and Procedures [Line Items] Equity-based compensation expense Share-based payment arrangement, expense Share-Based Payment Arrangement, Expense Common Stock authorized (in shares) Common Stock, Shares Authorized Goodwill and Intangible Assets Disclosure [Abstract] August 2025 Share Repurchase Program August 2025 Share Repurchase Program [Member] August 2025 Share Repurchase Program Common units issued (in shares) Stock Issued During Period, Shares, New Issues Current assets Assets, Current [Abstract] Total liabilities and equity Liabilities and Equity Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Stock Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Number of finance leases Lessee, Finance Lease, Number Of Contracts Lessee, Finance Lease, Number Of Contracts Liabilities and equity Liabilities and Equity [Abstract] Other expenses (income) Other Nonoperating Income (Expense) [Abstract] Cover [Abstract] DISCONTINUED OPERATIONS Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum Maximum [Member] Exercisable, weighted average exercise price (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Amortization life Finite-Lived Intangible Asset, Useful Life 2029 Purchase Obligation, to be Paid, Year Three Net income attributable to non-controlling interest Net income attributable to non-controlling interest Less: Net income attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Accounting Policies [Abstract] Accounting Policies [Abstract] Debt Instrument Leverage Ratio [Domain] Debt Instrument Leverage Ratio [Domain] Debt Instrument Leverage Ratio [Domain] Carrying Value Finite-Lived Intangible Assets, Net Schedule of Maturities of Lease Liabilities Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Net income from continuing operations Net income Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Vested in period, fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Present value of lease liability Operating Lease, Liability Share Repurchase Program [Line Items] Share Repurchase Program [Line Items] Non-controlling interest, common units (in shares) Noncontrolling Interest Common Unit Ownership by Parent Payments for repurchase of warrants Payments for Repurchase of Warrants Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Liabilities Liabilities [Abstract] ACQUISITIONS Business Combination [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Redemption of common units in i3 Verticals, LLC (in shares) Stock Redeemed or Called During Period, Shares Other long-term liabilities Other long-term liabilities Other Liabilities, Noncurrent Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Discontinued Operations, Held-for-Sale or Disposed of by Sale Discontinued Operations, Held-for-Sale or Disposed of by Sale [Member] Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Deferred revenue Increase (Decrease) in Deferred Revenue Adjusted Term SOFR Adjusted Term SOFR [Member] Adjusted Term SOFR Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Commitment fee multiplier Debt Instrument, Covenant, Commitment Fee Multiplier Debt Instrument, Covenant, Commitment Fee Multiplier Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Debt issuance costs, gross Debt Issuance Costs, Gross Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Net income from continuing operations attributable to i3 Verticals, Inc. Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Letter of Credit Letter of Credit [Member] Volume-weighted average price period Number of Days Volume-weighted Average Price Number of Days Volume-weighted Average Price Secured Debt Secured Debt [Member] Current portion of operating lease liabilities Operating Lease, Liability, Current Schedule of Changes in Level 3 Financial Instruments Measured on a Recurring Basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Class of Stock [Line Items] Class of Stock [Line Items] Deferred tax liability — long-term Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Net loss from discontinued operations attributable to i3 Verticals, Inc. Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Basic (in USD per share) Basic net income per share (in USD per share) Income (Loss) from Continuing Operations, Per Basic Share Award Type [Axis] Award Type [Axis] Deferred revenue — long-term Contract with Customer, Liability, Noncurrent Long-term debt Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] Schedule of Pro Forma Information Business Combination, Pro Forma Information [Table Text Block] Total assets Assets Investment, Name [Domain] Investment, Name [Domain] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year One Trading Symbol Trading Symbol 2030 Lessee, Operating Lease, Liability, to be Paid, Year Four Acquisitions Business Combination [Policy Text Block] Vested (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Entity Address, City or Town Entity Address, City or Town Establishment of liabilities under a tax receivable agreement and related changes to deferred tax assets associated with increases in tax basis Adjustments to Additional Paid in Capital, Tax Related Adjustments Adjustments to Additional Paid in Capital, Tax Related Adjustments Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Business Combination, Pro Forma Information [Line Items] Business Combination, Pro Forma Information [Line Items] Other segment expenses Segment Reporting, Other Segment Item, Amount Estimated amortization period Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Restricted stock units Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total purchase consideration Business Combination, Consideration Transferred 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Four Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Changes in operating assets: Increase (Decrease) in Operating Assets [Abstract] Right-of-use assets obtained in exchange for operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Outstanding at end of period (in shares) Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Payments on revolving credit facility Repayments of Lines of Credit Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Additional Class A common shares added at the beginning of calendar year as percentage of common stock outstanding at end of previous year (percent) Share Based Compensation Arrangement by Share Based Payment Award Number of Shares Available for Grant Annual Increase Percent Short-term leases Short-Term Lease Commitment, Amount Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Contingent consideration accrued at time of business combination Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Indefinite-lived intangible assets: Indefinite-Lived Intangible Assets (Excluding Goodwill) Business Combination [Domain] Business Combination [Domain] Related Party Related Party [Member] Payments for required distributions to members under the Tax Receivable Agreement Payments of Distributions to Affiliates Common Stock, outstanding (in shares) Beginning balance, outstanding (in shares) Ending balance, outstanding (in shares) Common Stock, Shares, Outstanding Discontinued operations Discontinued Operations, Policy [Policy Text Block] Plan Name [Axis] Plan Name [Axis] Document Information [Table] Document Information [Table] PEO PEO [Member] Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Reverse recapitalization, shares retired (in shares) Reverse Recapitalization, Shares, Retired Reverse Recapitalization, Shares, Retired Costs of services (excluding depreciation and amortization) Disposal Group, Including Discontinued Operation, Other Costs Of Services Disposal Group, Including Discontinued Operation, Other Costs Of Services Accrued income tax expense Accrued Income Taxes, Current Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Reportable Segment Reportable Segment [Member] Reportable Segment Retained Earnings (Deficit) Retained Earnings [Member] Settlement Assets and Obligations Settlement Assets and Obligations [Policy Text Block] Settlement Assets and Obligations Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Restricted Stock Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Provision for income taxes Income Tax Expense (Benefit) Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Basic (in USD per share) Basic net (loss) income per share (in USD per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net loss per share attributable to Class A common stockholders from discontinued operations: Net Income (Loss) Per Share Attributable To Class A Common Stockholders From Discontinuing Operations [Abstract] Net Income (Loss) Per Share Attributable To Class A Common Stockholders From Discontinuing Operations Class B Common Stock Class B Common Stock Common Class B [Member] Depreciation and amortization Depreciation, Depletion and Amortization Including Discontinued Operations Depreciation, Depletion and Amortization Including Discontinued Operations Exchangeable Notes Convertible Notes Payable [Member] Merchant Services Business Merchant Services Business [Member] Merchant Services Business Document Information [Line Items] Document Information [Line Items] Statement of Financial Position Location, Activity, Capitalization [Axis] Statement of Financial Position Location, Activity, Capitalization [Axis] Preferred Stock issued (in shares) Preferred Stock, Shares Issued Intangible assets, net Carrying Value Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Payments to extinguish exchangeable notes Payments to Extinguish Exchangeable Notes Payments to Extinguish Exchangeable Notes Diluted (in USD per share) Diluted net income per share (in USD per share) Income (Loss) from Continuing Operations, Per Diluted Share Net income Net income (loss) Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Payments for required distributions to members or on behalf of members for tax obligations Payments For Required Distributions To Members For Tax Obligations Payments For Required Distributions To Members For Tax Obligations Discontinued Operations and Disposal Groups [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] 2018 Equity Incentive Award Plan A2018EquityIncentiveAwardPlanMember Schedule of Preliminary Purchase Consideration of the Acquired Assets and Assumed Liabilities Business Combination, Recognized Asset Acquired and Liability Assumed [Table Text Block] Non-cash lease expense Operating Lease, Right-of-Use Asset, Periodic Reduction Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Customer deposits Contract with Customer, Refund Liability, Current Proceeds from stock option exercises Proceeds from Stock Options Exercised City Area Code City Area Code Acquisitions of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accrued Liabilities, Current Contingent consideration paid Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Legal Entity of Counterparty, Type [Axis] Legal Entity of Counterparty, Type [Axis] Schedule of Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Allocation of equity from non-controlling interests Noncontrolling Interest, Increase (Decrease) From Allocation Of Equity Noncontrolling Interest, Increase (Decrease) From Allocation Of Equity Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Unrecognized compensation expense related to unvested options at end of period Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Transaction costs incurred Disposal Group, Including Discontinued Operation, Transaction Cost Incurred Disposal Group, Including Discontinued Operation, Transaction Cost Incurred Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash provided by (used in) operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Related Party Transactions [Abstract] Net transfers from non-controlling interests Noncontrolling Interest, Period Increase (Decrease) Preferred Stock, par value (in USD per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Other Business Combinations Other Business Combinations [Member] Other Business Combinations Goodwill Balance at September 30, 2025 Balance at March 31, 2026 Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Technology operating expenses Technology Cost and Expense, Operating Technology Cost and Expense, Operating 2026 (six months remaining) Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Numerator Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Equity Components [Axis] Equity Components [Axis] ORGANIZATION AND OPERATIONS Nature of Operations [Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Concentration Risk [Table] Concentration Risk [Table] Number of reportable segments Number of Reportable Segments Sale of note hedge warrants Proceeds from Hedge, Financing Activities Warrants term Warrants and Rights Outstanding, Term Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Accounts receivable, net Business Combination, Recognized Asset Acquired, Receivable, Current Other Performance Measure, Amount Other Performance Measure, Amount Weighted Average Exercise Price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Entity Address, State or Province Entity Address, State or Province Net loss attributable to Class A common stockholders Net loss attributable to Class A common stockholders Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Cash and cash equivalents Cash And Cash Equivalents Including Discontinued Operations Cash And Cash Equivalents Including Discontinued Operations Individual: Individual [Axis] Restricted cash Restricted Cash Other current assets Other Assets, Current Excise taxes and commissions Share Repurchase Program, Excise Tax And Commissions Share Repurchase Program, Excise Tax And Commissions Entity [Domain] Entity [Domain] Maturity period of settlement assets and obligations (in days) Settlement Assets and Liabilities, Term Settlement Assets and Liabilities, Term Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] 2027 Purchase Obligation, to be Paid, Year One Adjustments to gain on sale of Merchant Services Business Gain (Loss) on Disposition of Business Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Greater than 2.00 to 1.00 but less than 2.50 to 1.0 Debt Instrument Leverage Ratio Three [Member] Debt Instrument Leverage Ratio Three Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Recapitalization from contribution to i3 Verticals, LLC (in shares) Stock Issued During Period, Shares, Recapitalization Stock Issued During Period, Shares, Recapitalization Entity Interactive Data Current Entity Interactive Data Current Operating lease costs Operating Lease, Cost Expenditures for capitalized software Payments for Software Capitalized software Computer Software, Intangible Asset [Member] Plan Name [Domain] Plan Name [Domain] Acquisition related cost, expense Business Combination, Acquisition-Related Cost, Expense Period for recognition of unrecognized compensation cost (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Schedule of Consolidated Total Net Leverage Ratio Summary of Consolidated Total Net Leverage Ratio [Table Text Block] Summary of Consolidated Total Net Leverage Ratio Thereafter Purchase Obligation, to be Paid, after Year Four Purchase Obligation, to be Paid, after Year Four Exercise or release of equity-based awards (in shares) Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Equity [Abstract] Revenue Recognition and Deferred Revenue Revenue from Contract with Customer [Policy Text Block] Software & Services, LLC ("S&S") Software & Services, LLC [Member] Software & Services, LLC Net income per share attributable to Class A common stockholders from continuing operations: Net Income (Loss) Per Share Attributable To Class A Common Stockholders From Continuing Operations [Abstract] Net Income (Loss) Per Share Attributable To Class A Common Stockholders From Continuing Operations Change in fair value of contingent consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration Including Discontinued Operations, Liability Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration Including Discontinued Operations, Liability Schedule of Equity-Based Compensation Expense Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] Less: Segment Reconciliation [Abstract] Purchase obligation Total Purchase Obligation SEGMENTS REPORTING Segment Reporting Disclosure [Text Block] Schedule of Minimum Fee Commitments Long-Term Purchase Commitment [Table Text Block] Settlement assets Settlement assets Settlement Assets, Current Loss on sale of derivatives Gain (Loss) on Sale of Derivatives Trademarks Trademarks [Member] Optional addition to borrowing capacity Line Of Credit, Optional Addition to Borrowing Capacity Line Of Credit, Optional Addition to Borrowing Capacity New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-lived intangible assets: Finite-Lived Intangible Assets [Line Items] Ownership [Domain] Ownership [Domain] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Contingent consideration Business Combination, Contingent Consideration, Liability Amortization expense of intangible assets Amortization of Intangible Assets Lease Expense Lessee, Leases [Policy Text Block] Redemption of common units in i3 Verticals, LLC Stock Redeemed or Called During Period, Value Selling, general and administrative Selling, General and Administrative Expense Deferred tax asset Deferred Income Tax Assets, Net Repurchases of Class A common stock Stock Repurchased During Period, Value Net income attributable to Class A common stockholders Net income attributable to Class A common stockholders Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic Depreciation and amortization Depreciation, Depletion and Amortization Other assets Other Assets, Noncurrent Accrued interest Interest Payable, Current Entity Central Index Key Entity Central Index Key PEO Name PEO Name Exchangeable notes, exchange price per share (in USD per share) Debt Instrument, Convertible, Conversion Price Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] 2028 Purchase Obligation, to be Paid, Year Two Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Revolving Credit Facility Revolving Credit Facility [Member] Balance, beginning Balance, ending Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Debt issuance costs written off Deferred Debt Issuance Cost, Writeoff Accrued contingent consideration — long-term portion Business Combination, Contingent Consideration, Liability, Noncurrent Arrangement Duration Trading Arrangement Duration Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Business combination, acquiree's earnings (loss) since acquisition date, actual Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual Accrued tax distributions Accrued Tax Distributions, Current Accrued Tax Distributions, Current Transfers from non-controlling interests: Net Income (Loss) Attributable to Redeemable Noncontrolling Interest [Abstract] Deferred revenue Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Warrants sold in connection with the issuance of the exchangeable notes (in USD per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Four Finite-Lived Intangible Asset, Expected Amortization, after Year Four Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Recapitalization from contribution to i3 Verticals, LLC Noncontrolling Interest, Increase from Recapitalization Of Contribution Noncontrolling Interest, Increase from Recapitalization Of Contribution Common unit price (in USD per share) Share Price Accrued Expenses and Other Current Liabilities Accrued Expenses and Other Current Liabilities [Member] Other (income) expenses Disposal Group, Including Discontinued Operation, Other Nonoperating Income (Expense) Disposal Group, Including Discontinued Operation, Other Nonoperating Income (Expense) Subsequent Event Type [Axis] Subsequent Event Type [Axis] EQUITY-BASED COMPENSATION Share-Based Payment Arrangement [Text Block] Accrued contingent consideration — current portion Business Combination, Contingent Consideration, Liability, Current Intangible assets Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill Assets Assets [Abstract] Acquisition escrow obligations Increase (Decrease) in Acquisition Escrow Obligations Increase (Decrease) in Acquisition Escrow Obligations Long-term debt, less current portion Long-Term Debt, Excluding Current Maturities Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Three Debt Instrument [Axis] Debt Instrument [Axis] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Gain on retirement of debt Gain (Loss) on Extinguishment of Debt Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Cost Finite-Lived Intangible Assets, Gross Stockholders' equity Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Legal Entity Type of Counterparty [Domain] Legal Entity Type of Counterparty [Domain] Employee health self-insurance liability Self Insurance Reserve, Current Loss before income taxes from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Accrued Contingent Consideration Accrued Contingent Consideration [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Value of shares repurchased Treasury Stock, Value, Acquired, Cost Method Debt Instrument Leverage Ratio [Axis] Debt Instrument Leverage Ratio [Axis] Debt Instrument Leverage Ratio Investment, Name [Axis] Investment, Name [Axis] Stated interest rate (percent) Debt Instrument, Interest Rate, Stated Percentage Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Loss from operations Disposal Group, Including Discontinued Operation, Operating Income (Loss) Operating lease liabilities, less current portion Operating Lease, Liability, Noncurrent Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Provision for (benefit from) income taxes Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period Ownership [Axis] Ownership [Axis] i3Verticals, LLC I3 Verticals LLC [Member] Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] People operating expenses Labor and Related Expense Schedule of Long-Term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Thereafter Lessee, Operating Lease, Liability, to be Paid, ​After​ Year​ Four Lessee, Operating Lease, Liability, to be Paid, ​After​ Year​ Four Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Total operating expenses Costs and Expenses Cost not yet recognized, amount Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Number of operating segments Number of Operating Segments 2028 Lessee, Operating Lease, Liability, to be Paid, Year Two Stock split, conversion ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Repayments of convertible debt Repayments of Convertible Debt Schedule of Accrued Expenses and Other Current Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Granted (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Forfeited and cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited And Cancelled in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited And Cancelled in Period Other Long-term Liabilities Other Noncurrent Liabilities [Member] Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Payment to acquire business Payments to Acquire Businesses, Gross Non-PEO NEO Non-PEO NEO [Member] Deferred revenue, current Business Combination, Recognized Liability Assumed, Deferred Revenue, Current Schedule of Prepaid Expenses and Other Current Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Interest expense, debt Interest Expense, Debt Business Combination, Pro Forma Information [Table] Business Combination, Pro Forma Information [Table] Employee Stock Options And Restricted Stock Units (RSUs) Employee Stock Options And Restricted Stock Units (RSUs) [Member] Employee Stock Options And Restricted Stock Units (RSUs) Name Trading Arrangement, Individual Name Equity Award [Domain] Award Type [Domain] Total assets acquired Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Assets Acquired Including Goodwill Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Assets Acquired Including Goodwill 2027 Lessee, Operating Lease, Liability, to be Paid, Year One Non-controlling interest Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Other non-cash adjustments to net income Other Noncash Income (Expense) Debt aggregate repurchase amount Debt Instrument, Repurchase Amount Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Redemption of common units in i3 Verticals, LLC Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Compensation Amount Outstanding Recovery Compensation Amount Aggregate principal amount Debt Instrument, Face Amount 2026 (six months remaining) Purchase Obligation, to be Paid, Remainder of Fiscal Year Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Recognition of unearned revenue Contract with Customer, Liability, Revenue Recognized Allocation of equity to non-controlling interests Adjustments To Additional Paid In Capital, Allocation Of Equity To Noncontrolling Interest Adjustments To Additional Paid In Capital, Allocation Of Equity To Noncontrolling Interest Payments for note hedge transactions Payments for Hedge, Financing Activities Share Repurchase Program [Axis] Share Repurchase Program [Axis] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Outstanding at beginning of period (in USD per share) Outstanding at end of period (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Restricted cash Restricted Cash, Noncurrent PREPAID EXPENSES AND OTHER CURRENT ASSETS Other Assets Disclosure [Text Block] Changes in non-cash contingent consideration expense from original estimate Change in fair value of contingent consideration Increase in non-cash contingent consideration expense from original estimate Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Denominator Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Other long-term liabilities Other Accrued Liabilities, Noncurrent Equity-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Net leverage ratio Debt Instrument, Covenant, Net Leverage Ratio Debt Instrument, Covenant, Net Leverage Ratio Litigation Case [Axis] Litigation Case [Axis] Segments [Domain] Segments [Domain] Loss contingency, damages sought, value Loss Contingency, Damages Sought, Value Schedule of Indefinite-Lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Long-term tax receivable agreement obligations Tax Receivable Agreement Obligation, Noncurrent Tax Receivable Agreement Obligation, Noncurrent Balance Sheet Location [Domain] Statement of Financial Position Location, Balance [Domain] Statement of Financial Position Location, Activity, Capitalization [Domain] Statement of Financial Position Location, Activity, Capitalization [Domain] Inventories Inventory, Net Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Accrued expenses and other current liabilities Business Combination, Recognized Liability Assumed, Accrued Expenses and Other Current Liabilities Business Combination, Recognized Liability Assumed, Accrued Expenses and Other Current Liabilities Minimum Minimum [Member] Net loss attributable to Class A common stockholders – diluted Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Diluted Accrued excise taxes Sales and Excise Tax Payable, Current Net income attributable to Class A common stockholders – diluted Net Income (Loss) from Continuing Operations Available to Common Shareholders, Diluted Goodwill attributable to the preliminary purchase price of the acquisition completed during the six months ended March 31, 2026 Goodwill, Measurement Period Adjustment Company Selected Measure Name Company Selected Measure Name Net income from continuing operations Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Utility Billing Software Company Utility Billing Software Company [Member] Utility Billing Software Company Schedule of Future Amortization Expense for Intangible Assets Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Preferred stock, par value $0.0001 per share, 10,000,000 shares authorized; 0 shares issued and outstanding as of March 31, 2026 and September 30, 2025 Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Discontinued Operations Discontinued Operations [Member] Net income attributable to Class A common stockholders – diluted Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Accrued contingent consideration Disposal Group, Including Discontinued Operation, Accrued Contingent Consideration Disposal Group, Including Discontinued Operation, Accrued Contingent Consideration Common stock Common Stock, Value, Issued Goodwill [Roll Forward] Goodwill [Roll Forward] Prepaid expenses and other current assets Business Combination, Recognized Asset Acquired, Prepaid Expense and Other Asset, Current COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Operating Activities [Domain] Operating Activities [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Revenue Disposal Group, Including Discontinued Operation, Revenue Diluted (in shares) Weighted average shares of Class A common stock outstanding - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Inventory Prepaid Inventory Prepaid Inventory Segment Information Segment Reporting, Policy [Policy Text Block] Commitments and contingencies (see Note 14) Commitments and Contingencies Fair value of stock options that vested Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value Changes in operating liabilities: Increase (Decrease) in Operating Liabilities [Abstract] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Accrued contingent consideration, long-term assets held for sale Disposal Group, Including Discontinued Operation, Accrued Contingent Consideration, Long-term Assets Held for Sale Disposal Group, Including Discontinued Operation, Accrued Contingent Consideration, Long-term Assets Held for Sale Business Combination [Axis] Business Combination [Axis] Entity Small Business Entity Small Business Accounting Standards Update and Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Non-compete agreements and other intangible assets Non-Compete Agreements And Other Intangible Assets [Member] Non-Compete Agreements And Other Intangible Assets Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Other operating expenses Other Cost and Expense, Operating Proprietary payments revenue Proprietary Payments Revenue [Member] Proprietary Payments Revenue Non-Controlling Interest Noncontrolling Interest [Member] 2030 Purchase Obligation, to be Paid, Year Four Preferred Stock outstanding (in shares) Preferred Stock, Shares Outstanding LONG-TERM DEBT Long-Term Debt [Text Block] Document Transition Report Document Transition Report Ownership percentage Equity Method Investment, Ownership Percentage Noncontrolling Interest [Table] Noncontrolling Interest [Table] Underlying Securities Award Underlying Securities Amount Concentration Risk [Line Items] Concentration Risk [Line Items] Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Forfeited and cancelled (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period INCOME TAXES Income Tax Disclosure [Text Block] Diluted net income per share: Diluted net loss per share: Earnings Per Share, Diluted [Abstract] Proceeds from revolving credit facility Proceeds from Lines of Credit Class A Common Stock Class A Common Stock Common Class A [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Tax benefits retained (percent) Tax Receivable Agreement, Percent of Tax Benefits Retained Reverse unit split Recapitalization Exchange Ratio Recapitalization Exchange Ratio Total equity Beginning balance, outstanding Ending balance, outstanding Equity, Including Portion Attributable to Noncontrolling Interest Average cost per share (in usd per share) Shares Acquired, Average Cost Per Share Consolidation basis (as a percent) Line of Credit Facility, Consolidation Basis Line of Credit Facility, Consolidation Basis Document Type Document Type EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Revenue Total revenue Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Expenditures for property and equipment Payments to Acquire Property, Plant, and Equipment Revenue earned at a point in time Transferred at Point in Time [Member] Selling, general and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense Name Forgone Recovery, Individual Name Total current assets Assets, Current Range [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] New Share Repurchase Program New Share Repurchase Program [Member] New Share Repurchase Program Disposal Group Classification [Axis] Disposal Group Classification [Axis] Forfeited and cancelled (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Authorized amount Share Repurchase Program, Authorized, Amount Commitment fee Commitment Fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Depreciation and amortization Disposal Group, Including Discontinued Operation, Depreciation and Amortization Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Payments for employees' tax withholdings from net settled stock option exercises and RSU releases Payment, Tax Withholding, Share-Based Payment Arrangement Capitalized contract costs Capitalized Contract Cost, Gross Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Infinx TSA and Infinx ELA Infinx TSA and Infinx ELA [Member] Infinx TSA and Infinx ELA Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Expected payments for repurchase of redeemable noncontrolling interest Expected Payments For Repurchase Of Redeemable Noncontrolling Interest Expected Payments For Repurchase Of Redeemable Noncontrolling Interest Share Repurchase Program [Domain] Share Repurchase Program [Domain] Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Tax benefits due to continuing equity owners Tax Benefit Due to Related Parties Current liabilities Liabilities, Current [Abstract] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Software and related services revenue License and Service [Member] Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Diluted net income per share (in USD per share) Earnings Per Share, Diluted Related Party Transaction [Table] Related Party Transaction [Table] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Title of 12(b) Security Title of 12(b) Security Supplemental disclosure of non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Prepaid insurance Prepaid Insurance Commissions related to capitalized contract costs Capitalized Contract Cost, Amortization Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share [Abstract] Earnings Per Share [Abstract] Exercise or release of equity-based awards APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition Total other expenses (income) Nonoperating Income (Expense) Non-controlling interest, ownership interest Non-controlling interest, ownership interest (as a percent) Subsidiary, Ownership Percentage, Parent Net loss from discontinued operations, net of income taxes Net loss Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Non-controlling interest, ownership interest increase Subsidiary, Ownership Increase Percentage, Parent Subsidiary, Ownership Increase Percentage, Parent Minimum consolidated interest coverage ratio Debt Covenant, Minimum Consolidated Interest Coverage Ratio Debt Covenant, Minimum Consolidated Interest Coverage Ratio Deferral of revenue Increase (Decrease) in Contract with Customer, Liability Noncontrolling Interest [Abstract] ACCRUED EXPENSES AND OTHER LIABILITIES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Contingent consideration paid in excess of original estimates Payment for Contingent Consideration Liability, Operating Activities Less: present value discount Lessee, Operating Lease, Liability, Undiscounted Excess Amount Debt interest, repurchase amount Debt Instrument, Accrued Interest, Repurchase Amount Debt Instrument, Accrued Interest, Repurchase Amount Payroc TSA and Payroc PSA Payroc TSA and Payroc PSA [Member] Payroc TSA and Payroc PSA Tax receivable agreement liability — current portion Tax Receivable Agreement Liability, Current Tax Receivable Agreement Liability, Current Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Shares repurchased (in shares) Treasury Stock, Shares, Acquired Exercised (in USD per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Two Award Timing Disclosures [Line Items] Transportation Market Acquisition Transportation Market Acquisition [Member] Transportation Market Acquisition Granted (in USD per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Accrued wages, bonuses, commissions and vacation Employee-related Liabilities, Current Total future minimum lease payments (undiscounted) Lessee, Operating Lease, Liability, to be Paid STOCKHOLDERS' EQUITY Equity [Text Block] Distributions to non-controlling interest holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Trade name Trade names Trade Names [Member] Net income (loss) attributable to Class A common stockholders Net income (loss) attributable to Class A common stockholders Net Income (Loss) Attributable to Parent Subsequent Event [Table] Subsequent Event [Table] Schedule of Significant Noncash Transactions Schedule of Other Significant Noncash Transactions [Table Text Block] Expiration Date Trading Arrangement Expiration Date Weighted-average grant date fair value (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Operating expenses Disposal Group, Including Discontinued Operation, Operating Expense [Abstract] Disposal Group, Including Discontinued Operation, Operating Expense Other accrued expenses Other Accrued Liabilities, Current Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Ownership percentage decrease Equity Method Investment, Ownership Percentage Decrease Equity Method Investment, Ownership Percentage Decrease Property and equipment, net Property, Plant and Equipment, Net Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Preferred Stock authorized (in shares) Preferred Stock, Shares Authorized Payments for repurchases of Class A common stock, including related excise taxes Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Base Rate Base Rate [Member] Potential additional consideration Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount Accrued interchange Accrued Interchange, Current Accrued Interchange, Current Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Healthcare RCM Business Healthcare RCM Business [Member] Healthcare RCM Business Inventories Inventory, Policy [Policy Text Block] Entity Current Reporting Status Entity Current Reporting Status Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Net payments for settlement obligations Net Payments For Settlement Obligations Net Payments For Settlement Obligations Proceeds from convertible debt Proceeds from Convertible Debt Customer relationships Customer relationships Customer Relationships [Member] Income from operations Operating Income (Loss) Line of Credit Line of Credit [Member] S & S Vs. State S & S Vs. State [Member] S & S Vs. State Accumulated earnings Retained Earnings (Accumulated Deficit) Other revenue Other Revenue [Member] Other Revenue Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Revenue earned over time Transferred over Time [Member] Maximum total leverage ratio Debt Covenant, Maximum Total Leverage Ratio Debt Covenant, Maximum Total Leverage Ratio Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Costs of services (excluding depreciation and amortization) Costs of services (excluding depreciation and amortization) Other Cost of Operating Revenue Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Payables and Accruals [Abstract] Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Shares available for grant under the plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant Other income Other income Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Provision for deferred income taxes Deferred Income Tax Expense (Benefit) Adjustments to reconcile net income from operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Net income from continuing operations attributable to non-controlling interest Less: Net income attributable to non-controlling interest Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest Net assets acquired Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill Total operating expenses Disposal Group, Including Discontinued Operation, Operating Expense NON-CONTROLLING INTEREST Noncontrolling Interest Disclosure [Text Block] Notes receivable — current portion Receivables, Net, Current Variable Rate [Domain] Variable Rate [Domain] Deferred revenue, beginning Deferred revenue, ending Contract with Customer, Liability Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Greater than 2.50 to 1.0 but less than 3.00 to 1.00 Debt Instrument Leverage Ratio Two [Member] Debt Instrument Leverage Ratio Two 1% Exchangeable Senior Notes due 2025 1% Exchangeable Senior Notes due 2025 [Member] 1% Exchangeable Senior Notes due 2025 Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Acquisition date fair value of contingent consideration in connection with business combinations Fair Value of Assets Acquired Income tax benefit (expense) related to equity-based compensation Share-Based Payment Arrangement, Expense, Tax Benefit Prepaid licenses Prepaid Licenses Prepaid Licenses LEASES Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Out-of-the-money Options Out-of-the-Money Stock Options [Member] Out-of-the-Money Stock Options Contract assets from contracts with customer Contract with Customer, Asset, before Allowance for Credit Loss Tax benefits payable to continuing equity owners (as a percent) Tax Receivable Agreement, Percent of Tax Benefits Payable to Continuing Equity Owners Weighted-average discount rate of operating leases (as a percent) Operating Lease, Weighted Average Discount Rate, Percent Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Forfeited and cancelled (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited And Cancelled, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited And Cancelled, Weighted Average Grant Date Fair Value Accrued third-party software expenses Accrued Third Party Software Expenses, Current Accrued Third Party Software Expenses, Current Greater than 3.00 to 1.0 Debt Instrument Leverage Ratio One [Member] Debt Instrument Leverage Ratio One Business combination, acquiree's revenue since acquisition date, actual Business Combination, Acquiree's Revenue since Acquisition Date, Actual Basic (in shares) Weighted average shares of Class A common stock outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic SIGNIFICANT NON-CASH TRANSACTIONS Cash Flow, Supplemental Disclosures [Text Block] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Schedule of Reconciliations of the Numerators and Denominators Used to Compute Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Share Repurchase Program [Table] Share Repurchase Program [Table] Options exercisable at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Related Party Transaction [Domain] Related Party Transaction [Domain] Subsequent Events [Abstract] Segment Reporting [Abstract] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Rent expense Operating Lease, Expense Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Amortization of debt issuance costs Amortization of deferred debt issuance costs Amortization of Debt Issuance Costs Entity Tax Identification Number Entity Tax Identification Number Reallocation of net loss assuming conversion of common units Reallocation of net loss assuming conversion of common units Dilutive Securities, Effect on Basic Earnings Per Share Outstanding at beginning of period (in USD per share) Outstanding at end of period (in USD per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount S & S Vs. Sheriffs S & S Vs. Sheriffs [Member] S & S Vs. Sheriffs Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common Stock, par value (in USD per share) Common Stock, Par or Stated Value Per Share Common Stock issued (in shares) Common Stock, Shares, Issued One, Two, Three or Six-month SOFR One, Two, Three or Six-month SOFR [Member] One, Two, Three or Six-month SOFR Weighted-average remaining lease term (in years) Operating Lease, Weighted Average Remaining Lease Term Schedule of Ownership Interest Redeemable Noncontrolling Interest [Table Text Block] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recapitalization from contribution to i3 Verticals, LLC Stock Issued During Period, Value, Recapitalization Stock Issued During Period, Value, Recapitalization Schedule of Changes in Goodwill Schedule of Goodwill [Table Text Block] Trading Arrangement: Trading Arrangement [Axis] Period of payment to continuing equity owners Period of Payment to Continuing Equity Owners Period of Payment to Continuing Equity Owners Total Shareholder Return Amount Total Shareholder Return Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Change in fair value of contingent consideration included in operating expenses Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Change from net income attributable to non-controlling interests and net transfers from non-controlling interests Net Income (Loss) Attributable To Noncontrolling Interest, After Transfers To (From) Noncontrolling Interests Net Income (Loss) Attributable To Noncontrolling Interest, After Transfers To (From) Noncontrolling Interests SUBSEQUENT EVENTS Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Proceeds from issuance of warrants Proceeds from Issuance of Warrants Security Exchange Name Security Exchange Name 2020 Equity Incentive Award Plan A2020 Equity Incentive Award Plan [Member] A2020 Equity Incentive Award Plan Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Gain on repurchase of warrants Gain (Loss) On Repurchase Of Warrants Gain (Loss) On Repurchase Of Warrants Right-of-use assets obtained in exchange for operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability And Modifications Right-of-Use Asset Obtained in Exchange for Operating Lease Liability And Modifications Settlement obligations Settlement Liabilities, Current Capitalized software, net Capitalized Computer Software, Net Revolving line of credit borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Capital contribution Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent Repurchases of Class A common stock (in shares) Stock Repurchased During Period, Shares Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-Lived Intangible Assets, Major Class Name [Domain] Operating expenses Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Revolving lines of credit to banks under the 2023 Senior Secured Credit Facility Revolving Credit Lines 2023 Senior Secured Credit Facility [Member] Revolving Credit Lines 2023 Senior Secured Credit Facility Escrow liabilities — long-term Escrow Liabilities, Noncurrent Escrow Liabilities, Noncurrent Net loss from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Statement [Line Items] Statement [Line Items] Variable Rate [Axis] Variable Rate [Axis] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] Schedule of Activity Related to Restricted Stock Unit Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Subsequent Event [Line Items] Subsequent Event [Line Items] Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net decrease in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Weighted average effect of dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment