Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate Corporate, Non-Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Total income from operations of reportable segments Operating Income (Loss) Interest expense Interest Expense Plus (less) other, net Other Nonoperating Income (Expense) Income tax benefit (expense) Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Accounting Policies [Abstract] Number of reportable segments Number of Reportable Segments Notes receivable, noncurrent Notes, Loans and Financing Receivable, Gross, Noncurrent Asset Acquisition [Abstract] Asset Acquisition [Abstract] Schedule of Asset Acquisition [Table] Schedule of Asset Acquisition [Table] Schedule of Asset Acquisition [Table] Asset Acquisition [Axis] Asset Acquisition [Axis] Asset Acquisition [Axis] Asset Acquisition [Domain] Asset Acquisition [Domain] [Domain] for Asset Acquisition [Axis] YapStone, Inc YapStone, Inc [Member] YapStone, Inc [Member] Schedule of Asset Acquisition [Line Items] Schedule of Asset Acquisition [Line Items] [Line Items] for Schedule of Asset Acquisition [Table] Payments for asset acquisitions Payments For Asset Acquisitions Payments For Asset Acquisitions Fair value of non-controlling interest acquired Stockholders' Equity Attributable to Noncontrolling Interest Software license agreement acquired Asset Acquisition, Software License Agreement Asset Acquisition, Software License Agreement Services agreement acquired Asset Acquisition, Service Agreement Asset Acquisition, Service Agreement Disclosure of Compensation Related Costs, Share-based Payments [Abstract] EQUITY-BASED COMPENSATION PLANS Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Cover page. Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Commercial Payments Commercial Payments And Managed Services [Member] Commercial Payments And Managed Services [Member] Debt Disclosure [Abstract] Schedule of Long-Term Debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Syndicate of Lenders Syndicate Of Lenders [Member] Syndicate Of Lenders [Member] Goldman Sachs Specialty Lending Group Goldman Sachs Specialty Lending Group [Member] Goldman Sachs Specialty Lending Group [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term Loan Term Loan [Member] Term Loan [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Payment-in-Kind Interest Rate Payment-In-Kind Interest Rate [Member] Payment-In-Kind Interest Rate Debt Instrument [Line Items] Debt Instrument [Line Items] Total Long-term Debt, Gross Less: current portion of long-term debt Long-term Debt, Current Maturities Less: unamortized debt discounts Debt Instrument, Unamortized Discount Less: deferred financing costs Debt Issuance Costs, Net Total long-term debt Long-term Debt Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Interest rate during period Line of Credit Facility, Interest Rate at Period End Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Merchant portfolios Service Agreements [Member] Non-compete agreements Noncompete Agreements [Member] Trade names Trade Names [Member] Acquired technology Developed Technology Rights [Member] Customer relationships Customer Relationships [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Intangible assets, gross Finite-Lived Intangible Assets, Gross Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangible assets, net Finite-Lived Intangible Assets, Net Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] SETTLEMENT ASSETS AND OBLIGATIONS Settlement Assets And Obligations [Text Block] Settlement Assets And Obligations [Text Block] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Furniture and fixtures Furniture and Fixtures [Member] Equipment Equipment [Member] Computer software Software and Software Development Costs [Member] Leasehold improvements Leasehold Improvements [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property, equipment and software, gross Property, Plant and Equipment, Gross Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, equipment, and software, net Property, Plant and Equipment, Net Useful Life Property, Plant and Equipment, Useful Life Depreciation expense Depreciation NATURE OF BUSINESAS AND BASIS OF PRESENTATION Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Equity [Abstract] EQUITY Stockholders' Equity Note Disclosure [Text Block] Amortization of intangible assets Amortization of Intangible Assets Goodwill accumulated impairment loss Goodwill, Impaired, Accumulated Impairment Loss Earnings Per Share [Abstract] Schedule of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2018 Equity Incentive Plan 2018 Equity Incentive Plan [Member] 2018 Equity Incentive Plan [Member] 2014 Management Incentive Plan 2014 Management Incentive Plan [Member] 2014 Management Incentive Plan [Member] Earnout Incentive Plan The Earnout Incentive Plan [Member] The Earnout Incentive Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity-based compensation Allocated Share-based Compensation Expense Income Tax Disclosure [Abstract] Deferred tax benefit Deferred Income Tax Expense (Benefit) Provision (adjustment) for DTA valuation allowance Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Provision for DTA valuation allowance - discrete item Deferred Other Tax Expense (Benefit) Total income tax (benefit) provision Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Preferred stock issued (in shares) Preferred Stock, Shares Issued Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Merchant card fees Credit and Debit Card [Member] Outsourced services and other License and Service [Member] Statement [Line Items] Statement [Line Items] REVENUE: Revenues [Abstract] Total revenue Revenues OPERATING EXPENSES: Operating Expenses [Abstract] Cost of services Cost of Goods and Services Sold Salary and employee benefits Labor and Related Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Selling, general and administrative Selling, General and Administrative Expense Total operating expenses Operating Expenses Income from operations OTHER INCOME (EXPENSES): Other Nonoperating Income (Expense) [Abstract] Interest expense Other, net Total other expenses, net Nonoperating Income (Expense) Loss before income taxes Income (Loss) Attributable to Parent, before Tax Income tax (benefit) expense Net loss Loss per common share: Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted (in dollar per share) Earnings Per Share, Basic and Diluted Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted PRO FORMA (C-corporation basis): Change In Tax Basis Abstract [Abstract] Change In Tax Basis Abstract [Abstract] Pro forma income tax expense (benefit) Business Acquisition, Pro Forma Income Tax Expense (Benefit) Business Acquisition, Pro Forma Income Tax Expense (Benefit) Pro forma net loss Business Acquisition, Pro Forma Net Income (Loss) Pro forma loss per common share: Earnings Per Share, Pro Forma [Abstract] Basic and diluted (in dollar per share) Business Acquisition, Pro Forma Earnings Per Share, Basic And Diluted Business Acquisition, Pro Forma Earnings Per Share, Basic And Diluted Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Outstanding warrants on common stock Warrant [Member] Restricted stock awards issued under 2018 Equity Incentive Plan Restricted Stock Units (RSUs) [Member] Outstanding stock option awards issued under 2018 Equity Incentive Plan Employee Stock Option [Member] Earnout incentive awards issued and subject to vesting Earnout Incentive Awards [Member] Earnout Incentive Awards [Member] Earnout Incentive Awards Subject To Future Issuance [Member] Earnout Incentive Awards Subject To Future Issuance [Member] Earnout Incentive Awards Subject To Future Issuance [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive securities that were excluded from EPS (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Receivables [Abstract] Notes receivable, maximum loan commitment available for future issuance, noncurrent Notes, Loans And Financing Receivable, Gross, Maximum Loan Commitment Available For Future Issuance, Noncurrent Notes, Loans And Financing Receivable, Gross, Maximum Loan Commitment Available For Future Issuance, Noncurrent Notes receivable, noncurrent, annual interest rate Notes, Loans And Financing Receivable, Gross, Noncurrent, Annual Interest Rate Notes, Loans And Financing Receivable, Gross, Noncurrent, Annual Interest Rate Property, Equipment and Software Property, Plant and Equipment [Table Text Block] Asset Acquisitions [Abstract] Asset Acquisitions [Abstract] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] President, Chief Executive Officer And Chairman President, Chief Executive Officer And Chairman [Member] President, Chief Executive Officer And Chairman [Member] Percentage of ownership before transaction Percentage Of Ownership Before Transaction Percentage Of Ownership Before Transaction Redeemable noncontrolling interest, equity, preferred, redemption value Redeemable Noncontrolling Interest, Equity, Preferred, Redemption Value Preferred yield per year Redeemable Noncontrolling Interest, Equity, Preferred, Annual Preferred Yield Percent Redeemable Noncontrolling Interest, Equity, Preferred, Annual Preferred Yield Percent Preferred stock, percentage owned Preferred Stock, Percentage Owned Preferred Stock, Percentage Owned Schedule of Segment Reporting Information by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of Revenue from Segments to Consolidated Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Schedule of Equity Structure Schedule of Stockholders Equity [Table Text Block] Accounts Payable [Abstract] Schedule of Accounts Payable and Accrued Expenses Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustment to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization of assets Depreciation, Depletion and Amortization Equity-based compensation Amortization of debt issuance costs and discounts Amortization of Debt Issuance Costs and Discounts Equity in loss and impairment of unconsolidated entities Income (Loss) from Equity Method Investments Provision for deferred income tax Deferred Income Taxes and Tax Credits Change in fair value of warrant liability Fair Value Adjustment of Warrants Provisions for allowance for deferred tax assets Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Loss on debt extinguishment Gain (Loss) on Extinguishment of Debt Payment-in-kind interest Paid-in-Kind Interest Other non-cash Other Noncash Income (Expense) Change in operating assets and liabilities, net of business combinations: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Settlement assets and obligations, net Increase (Decrease) In Settlement Assets Increase (Decrease) In Settlement Assets Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Notes receivable Increase (Decrease) in Notes Receivables Accounts payable and other accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Customer deposits and advance payments Increase (Decrease) in Customer Deposits Other assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Payments for business acquisitions Payments to Acquire Businesses, Net of Cash Acquired Additions to property, equipment and software Payments to Acquire Property, Plant, and Equipment Acquisitions of merchant portfolios and assets Payments to Acquire Intangible Assets Note receivable loan funding Origination of Notes Receivable from Related Parties Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of long-term debt, net of issue discount Proceeds from Issuance of Long-term Debt Repayment of long-term debt Repayments of Long-term Debt Debt issuance costs refunded (paid) Payments of Debt Issuance Costs Borrowings under revolving credit facility Proceeds from Lines of Credit Repayments under revolving credit facility Repayments of Lines of Credit Distributions to members prior to July 25, 2018 recapitalization Payments of Dividends Redemptions of membership interests prior to July 25, 2018 recapitalization Payments For Redemptions Of Membership Interests Payments For Redemptions Of Membership Interests Recapitalization proceeds Proceeds From Recapitalization Proceeds From Recapitalization Repurchases of common stock Payments for Repurchase of Common Stock Founders shares redemptions Payments For Redemption Of Founders Shares Payments For Redemption Of Founders Shares Redemption of warrants Payments for Repurchase of Warrants Recapitalization costs Payments of Stock Issuance Costs Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net decrease in cash and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and restricted cash at beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and restricted cash at September 30 Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Recognition of initial net deferred income tax asset Deferred Tax Asset Recognition Deferred Tax Asset Recognition Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Purchases of property, equipment and software through accounts payable Capital Expenditures Incurred but Not yet Paid Intangible assets acquired by issuing non-controlling interest in a subsidiary Intangible Assets Acquired By Non-Controlling Interest Entity Intangible Assets Acquired By Non-Controlling Interest Entity Notes receivable from sellers used as partial consideration for business acquisitions Notes Issued Cash consideration payable for business acquisition Business Combination, Contingent Consideration, Liability Recapitalization cost remaining in accounts payable Recapitalization Costs Remaining Recapitalization Costs Remaining Common stock issued as partial consideration in business acquisitions Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Reconciliation of cash and restricted cash: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash Cash Restricted cash Restricted Cash and Cash Equivalents Total cash and restricted cash Fair Value Disclosures [Abstract] FAIR VALUE Fair Value Disclosures [Text Block] Fair Value, Liabilities Measured on Recurring Basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Settlement Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Settlement Obligations Other Current Liabilities [Table Text Block] PROPERTY, EQUIPMENT AND SOFTWARE Property, Plant and Equipment Disclosure [Text Block] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Consumer Payments Consumer Payments [Member] Consumer Payments [Member] Integrated Partners Integrated Partners [Member] Integrated Partners [Member] Revenues: Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Income (loss) from operations: Net Income (Loss) Attributable to Parent [Abstract] Depreciation and amortization: Depreciation, Amortization and Accretion, Net [Abstract] 2020 Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months 2021 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Two 2022 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Three 2023 Long-term Debt, Maturities, Repayments of Principal in Rolling Year Four Total Debt Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Goodwill Goodwill ACCOUNTS PAYABLE AND ACCRUED EXPENSES Accounts Payable and Accrued Liabilities Disclosure [Text Block] Related Party Transactions [Abstract] RELATED PARTY AND OTHER TRANSACTIONS Related Party Transactions Disclosure [Text Block] Basic Loss Per Common Share: Earnings Per Share, Basic, Other Disclosures [Abstract] Numerator: Earnings Per Share, Basic [Abstract] Less: Distributions to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Net loss attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Denominator: Weighted-average shares outstanding (in shares) Basic loss per common share (in dollars per share) Earnings Per Share, Basic Numerator [Abstract] Numerator [Abstract] Numerator [Abstract] Less: Gain on warrant liability Warrant, Down Round Feature, (Increase) Decrease in Equity, Amount Net loss attributable to common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Denominator [Abstract] Denominator [Abstract] Denominator [Abstract] Dilutive common share equivalents (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted-average dilutive shares outstanding (in shares) Diluted loss per common share (in dollars per share) Earnings Per Share, Diluted Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Delayed Draw Delayed Draw [Member] Delayed Draw [Member] Revolving Credit Facility Revolving Credit Facility [Member] Base Rate Base Rate [Member] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt discount Unused commitment fee amount Line of Credit Facility, Commitment Fee Amount Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Borrowings outstanding under revolving credit facility Long-term Line of Credit Undrawn commitment for a letter of credit Letters of Credit Outstanding, Amount Applicable margin Unused commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Quarterly principal payment Debt Instrument, Periodic Payment Interest expense Amortization related to amortization of deferred finance costs and debt discounts Amortization Of Debt Discount (Premium) And Debt Issuance Costs Amortization Of Debt Discount (Premium) And Debt Issuance Costs Debt covenant, maximum net leverage ratio Debt Covenant, Maximum Net Leverage Ratio Debt Covenant, Maximum Net Leverage Ratio Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Asset acquisition, intangible assets Asset Acquisition, Intangible Assets Asset Acquisition, Intangible Assets Asset acquisition, contingent consideration Asset Acquisition, Contingent Consideration Asset Acquisition, Contingent Consideration LOSS PER SHARE Earnings Per Share [Text Block] Accounts payable Accounts Payable Accrued compensation Employee-related Liabilities, Current Accrued network fees Other Accrued Liabilities, Current Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] GS 1.8% Warrants GS 1.8% Warrants [Member] GS 1.8% Warrants [Member] GS 2.2% Warrants GS 2.2% Warrants [Member] GS 2.2% Warrants [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A Common Class A [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] PPS Tech and PPS Northeast Priority Payment Systems Tech Partners And Priority Payment Systems Northeast [Member] Priority Payment Systems Tech Partners And Priority Payment Systems Northeast [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Warrant, percentage of outstanding stock available for purchase Class Of Warrant Or Right, Percentage Of Outstanding Stock Available For Purchase Class Of Warrant Or Right, Percentage Of Outstanding Stock Available For Purchase Warrant, term Warrants and Rights Outstanding, Term Warrant exercise price (USD per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Increase (decrease) in fair value of liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Payments for repurchase of warrants Contingent consideration Notes receivable, fair value Notes Receivable, Fair Value Disclosure Summary of Equity Based Compensation by Plan Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Consolidation Consolidation, Policy [Policy Text Block] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Cash and Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Notes Receivable Receivables, Policy [Policy Text Block] Reclassification Reclassification, Policy [Policy Text Block] Components of Revenues and Expenses Revenue Recognition, Policy [Policy Text Block] New Accounting Standards Adopted and Recently Issued Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Concentration of Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] MI Acquisitions Warrants, Public MI Acquisitions Warrants, Public [Member] MI Acquisitions Warrants, Public [Member] MI Acquisitions Warrants, Private MI Acquisitions Warrants, Private [Member] MI Acquisitions Warrants, Private [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Tranche One Share-based Compensation Award, Tranche One [Member] Tranche Two Share-based Compensation Award, Tranche Two [Member] Class of Stock [Line Items] Class of Stock [Line Items] Common stock repurchased (in shares) Stock Repurchased During Period, Shares Common stock repurchased, average price per share (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Common stock repurchased, value Stock Repurchased During Period, Value Class of warrant or right, outstanding (in shares) Class of Warrant or Right, Outstanding Warrants and rights, number of shares allowed to purchase (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Class of warrant or right, number of securities called by each warrant or right (in shares) Class of Warrant or Right, Number of Securities Called by Each Warrant or Right Common shares issued as earn-out consideration (in shares) Common Stock, Shares Authorized, Earn-Out Consideration Common Stock, Shares Authorized, Earn-Out Consideration Earn-out consideration, future minimum EBITDA Earn-Out Consideration, Future Minimum EBITDA Earn-Out Consideration, Future Minimum EBITDA Earn-out consideration, minimum stock price (in dollars per share) Earn-Out Consideration, Minimum Stock Price Earn-Out Consideration, Minimum Stock Price Common shares issued as earn-out consideration (in shares) Common Stock, Shares Issued, Earn-Out Consideration Common Stock, Shares Issued, Earn-Out Consideration Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Schedule of Income Tax (Benefit) Provision Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current Assets: Assets, Current [Abstract] Cash Restricted cash Accounts receivable, net of allowance for doubtful accounts of $581 and $511 Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Current portion of notes receivable Notes, Loans and Financing Receivable, Net, Current Settlement assets Settlement Assets, Current Total current assets Assets, Current Notes receivable, less current portion Notes, Loans and Financing Receivable, Net, Noncurrent Property, equipment, and software, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Deferred income taxes, net Deferred Tax Assets, Net, Noncurrent Other non-current assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS' DEFICIT Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Accrued residual commissions Accrued Sales Commission, Current Customer deposits and advance payments Customer Deposits, Current Current portion of long-term debt Settlement obligations Settlement Liabilities, Current Total current liabilities Liabilities, Current Long-term debt, net of current portion, discounts and debt issuance costs Long-term Debt, Excluding Current Maturities Other non-current liabilities Other Liabilities, Noncurrent Total long-term liabilities Liabilities, Noncurrent Total liabilities Liabilities Commitments and Contingencies (Notes 9 and 10) Commitments and Contingencies Stockholders' deficit: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Treasury stock, at cost Treasury Stock, Value Accumulated deficit Retained Earnings (Accumulated Deficit) Total Priority Technology Holdings, Inc. stockholders' deficit Stockholders' Equity Attributable to Parent Non-controlling interest Total stockholders' deficit Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and stockholders' deficit Liabilities and Equity Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock Preferred Stock [Member] Common Stock Common Stock [Member] Treasury Stock Treasury Stock [Member] Additional Paid-In Capital Additional Paid-in Capital [Member] Accumulated (Deficit) Retained Earnings [Member] Total Priority Technology Holdings, Inc. Stockholders' (Deficit) Parent [Member] Non-Controlling Interest Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Outstanding Beginning balance Distribution to members Dividends Member redemption (in shares) Stock Redeemed or Called During Period, Shares Member redemption Stock Redeemed or Called During Period, Value Pro-rata adjustment (in shares) Stock Issued During Period, Shares, Conversion of Units Equity-based compensation (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Equity-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Common stock issued (in shares) Stock Issued During Period, Shares, Acquisitions Common stock issued Stock Issued During Period, Value, Acquisitions Warrant redemptions (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of MI Acquisitions shares Stock Issued During Period, Value, Conversion of Convertible Securities Effects of Founders' Share Agreement (in shares) Effects Of Founders' Share Agreement, Shares Effects Of Founders' Share Agreement, Shares Effects of Founders' Share Agreement Effects Of Founders' Share Agreement, Value Effects Of Founders' Share Agreement, Value Recapitalization costs Recapitalization Costs Net deferred income tax asset Adjustments To Additional Paid In Capital, Income Tax Effect, Loss Of Partnership Status Adjustments To Additional Paid In Capital, Income Tax Effect, Loss Of Partnership Status Repurchases of common stock (in shares) Repurchases of common stock Issuance of non-controlling interest Noncontrolling Interest, Increase from Subsidiary Equity Issuance Ending balance (in shares) Ending balance INCOME TAXES Income Tax Disclosure [Text Block] Contingent Consideration Contingent Consideration [Member] Contingent Consideration [Member] Warrant Liability 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] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Extinguishment of GS warrant liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements GS 2.2% warrant liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Adjustment to fair value included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Adjustment to fair value included in earnings Ending balance Schedule of Goodwill Schedule of Goodwill [Table Text Block] Schedule of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Direct Connect Merchant Services LLC Direct Connect Merchant Services LLC [Member] Direct Connect Merchant Services LLC [Member] Certain Merchant Portfolio Residual Rights Certain Merchant Portfolio Residual Rights [Member] Certain Merchant Portfolio Residual Rights [Member] Contingent cash payments for asset acquisitions Contingent Cash Payments For Asset Acquisitions Contingent Cash Payments For Asset Acquisitions GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Tax Cuts And Jobs Act Of 2017, incomplete accounting, provisional liability Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Liability Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Liability Tax Cuts And Jobs Act Of 2017, incomplete accounting, provisional liability, deferred tax assets Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Liability, Deferred Tax Assets Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Liability, Deferred Tax Assets Tax Cuts And Jobs Act Of 2017, incomplete accounting, provisional income tax expense (benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) LONG-TERM DEBT Debt Disclosure [Text Block] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current ACQUISITIONS AND CONTRIBUTIONS OF ASSETS Asset Acquisition Disclosure [Text Block] Asset Acquisition Disclosure [Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Card settlements due from merchants, net of estimated losses Card Settlements Due From Merchants [Member] Card Settlements Due From Merchants [Member] Card settlements due from processors Card Settlements Due From Processors [Member] Card Settlements Due From Processors [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Card settlements due to merchants Card Settlements Due To Merchants [Member] Card Settlements Due To Merchants [Member] Due to ACH payees Due To ACH Payees [Member] Due To ACH Payees [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Merchant reserves held by sponsor banks Merchant Reserves Held By Sponsor Banks Merchant Reserves Held By Sponsor Banks Settlement assets, estimated shortfall Settlement Assets, Estimated Shortfall Settlement Assets, Estimated Shortfall RECONCILIATION OF STOCKHOLDERS' EQUITY (DEFICIT) AND NON-CONTROLLING INTEREST