0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - NATURE OF OPERATIONS AND BASIS OF PRESENTATION link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - FAIR VALUE link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Investments, Equity Method and Joint Ventures link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - PROPERTY AND EQUIPMENT link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - ACCRUED EXPENSES link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - ASSETS HELD FOR SALE AND BUSINESS DISPOSITION link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - COMMON STOCK link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - STOCK - BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - EARNINGS (LOSS) PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - RELATED-PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - REPORTABLE SEGMENT link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - NATURE OF OPERATIONS AND BASIS OF PRESENTATION (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - NATURE OF OPERATIONS AND BASIS OF PRESENTATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - REVENUE RECOGNITION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - FAIR VALUE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - PROPERTY AND EQUIPMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - ACCRUED EXPENSES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Discontinued Operations and Disposal Groups (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - COMMON STOCK (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - STOCK - BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - EARNINGS (LOSS) PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - REPORTABLE SEGMENT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - NATURE OF OPERATIONS AND BASIS OF PRESENTATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - NATURE OF OPERATIONS AND BASIS OF PRESENTATION - Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - REVENUE RECOGNITION - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - REVENUE RECOGNITION - Schedule of Contract with Customer, Contract Asset, Contract Liability, and Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - REVENUE RECOGNITION - Deferred Liability Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - FAIR VALUE - Schedule of Financial Liabilities Measured at Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - FAIR VALUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - FAIR VALUE - Schedule of Fair Values Roll Forward of Contingent Consideration (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - FAIR VALUE - Schedule of Non-financial Instruments Measured at Fair Value, on a Nonrecurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Investments, Equity Method and Joint Ventures (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - PROPERTY AND EQUIPMENT - Summary of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - PROPERTY AND EQUIPMENT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET - Intangible Asset, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET - Estimated Amortization of Internal Use Software (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - ACCRUED EXPENSES (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - ASSETS HELD FOR SALE AND BUSINESS DISPOSITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - ASSETS HELD FOR SALE AND BUSINESS DISPOSITION (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - LEASES - Lease Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - LEASES - Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - COMMON STOCK (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - STOCK - BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - STOCK - BASED COMPENSATION - Summary of Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - STOCK - BASED COMPENSATION - Summary of Restricted Stock Units Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - STOCK - BASED COMPENSATION - Summary of Stock-based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - STOCK - BASED COMPENSATION - Summary of Performance Stock Units Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - EARNINGS (LOSS) PER SHARE - Computation of Net Loss Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - EARNINGS (LOSS) PER SHARE - Schedule of Anti-dilutive Shares Excluded (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - RELATED-PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - REPORTABLE SEGMENT (Details) link:presentationLink link:calculationLink link:definitionLink