0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Statement - Unaudited Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - Unaudited Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - Unaudited Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - Unaudited Consolidated Statements of Changes in Stockholders' Deficit link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - Unaudited Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 0000007 - Disclosure - NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 0000008 - Disclosure - REVENUES link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - SETTLEMENT ASSETS AND CUSTOMER ACCOUNT BALANCES AND RELATED OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - NOTES RECEIVABLE link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - DEBT OBLIGATIONS link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - FAIR VALUE link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - REDEEMABLE SENIOR PREFERRED STOCK AND WARRANTS link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - SEGMENT INFORMATION link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - LOSS PER COMMON SHARE link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - (Policies) link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - REVENUES (Tables) link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - ACQUISITIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - SETTLEMENT ASSETS AND CUSTOMER ACCOUNT BALANCES AND RELATED OBLIGATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - (Tables) link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE - (Tables) link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - NOTES RECEIVABLE - (Tables) link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - DEBT OBLIGATIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - Fair Value Measures and Disclosures (Tables) link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - REDEEMABLE SENIOR PREFERRED STOCK AND WARRANTS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - STOCK-BASED COMPENSATION - (Tables) link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 0000036 - Disclosure - SEGMENT INFORMATION - (Tables) link:presentationLink link:calculationLink link:definitionLink 0000037 - Disclosure - LOSS PER COMMON SHARE - (Tables) link:presentationLink link:calculationLink link:definitionLink 0000038 - Disclosure - REVENUES - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 0000039 - Disclosure - REVENUES - Contract with Customer Liability (Details) link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - REVENUES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - REVENUES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - ACQUISITIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - ACQUISITIONS - Schedule of Acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 0000043 - Disclosure - ACQUISITIONS - Purchase Price Allocation (Details) link:presentationLink link:calculationLink link:definitionLink 0000044 - Disclosure - SETTLEMENT ASSETS AND CUSTOMER ACCOUNT BALANCES AND RELATED OBLIGATIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000045 - Disclosure - SETTLEMENT ASSETS AND CUSTOMER ACCOUNT BALANCES AND RELATED OBLIGATIONS - Schedule of Settlement Assets and Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 0000046 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Goodwill Allocation (Details) link:presentationLink link:calculationLink link:definitionLink 0000047 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 0000048 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000049 - Disclosure - GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000050 - Disclosure - PROPERTY, EQUIPMENT AND SOFTWARE - (Details) link:presentationLink link:calculationLink link:definitionLink 0000051 - Disclosure - NOTES RECEIVABLE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000052 - Disclosure - NOTES RECEIVABLE - Schedule of Principal Payments to be Received (Details) link:presentationLink link:calculationLink link:definitionLink 0000053 - Disclosure - DEBT OBLIGATIONS - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 0000054 - Disclosure - DEBT OBLIGATIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000055 - Disclosure - DEBT OBLIGATIONS (Details) link:presentationLink link:calculationLink link:definitionLink 0000056 - Disclosure - FAIR VALUE - Contingent Consideration Current and Non-Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000057 - Disclosure - FAIR VALUE - Contingent Consideration Liability Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 0000058 - Disclosure - FAIR VALUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000059 - Disclosure - REDEEMABLE SENIOR PREFERRED STOCK AND WARRANTS - Reconciliation of Temporary Equity (Details) link:presentationLink link:calculationLink link:definitionLink 0000060 - Disclosure - REDEEMABLE SENIOR PREFERRED STOCK AND WARRANTS - Schedule of Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 0000061 - Disclosure - REDEEMABLE SENIOR PREFERRED STOCK AND WARRANTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000062 - Disclosure - INCOME TAXES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000063 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000064 - Disclosure - RELATED PARTY TRANSACTIONS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000065 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Equity-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 0000066 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000067 - Disclosure - STOCKHOLDERS' EQUITY - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000068 - Disclosure - STOCKHOLDERS' EQUITY - Share Repurchase Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000069 - Disclosure - SEGMENT INFORMATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000070 - Disclosure - SEGMENT INFORMATION - Schedule of Segment Reporting Information by Segment (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - SEGMENT INFORMATION - Reconciliation of Total Operating Income (Details) link:presentationLink link:calculationLink link:definitionLink 0000072 - Disclosure - LOSS PER COMMON SHARE - Schedule of Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 0000073 - Disclosure - LOSS PER COMMON SHARE - Schedule of Antidilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink