0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 0000003 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 0000004 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0000005 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME link:presentationLink link:calculationLink link:definitionLink 0000006 - Statement - CONSOLIDATED STATEMENTS OF EQUITY link:presentationLink link:calculationLink link:definitionLink 0000007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 0000008 - Disclosure - ORGANIZATION link:presentationLink link:calculationLink link:definitionLink 0000009 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 0000010 - Disclosure - CUSTOMER CONCENTRATION link:presentationLink link:calculationLink link:definitionLink 0000011 - Disclosure - SALE OF BUSINESSES link:presentationLink link:calculationLink link:definitionLink 0000012 - Disclosure - ACCOUNTS RECEIVABLE, NET link:presentationLink link:calculationLink link:definitionLink 0000013 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS link:presentationLink link:calculationLink link:definitionLink 0000014 - Disclosure - PREMISES AND EQUIPMENT, NET link:presentationLink link:calculationLink link:definitionLink 0000015 - Disclosure - RIGHT-OF-USE ASSETS UNDER OPERATING LEASES, NET link:presentationLink link:calculationLink link:definitionLink 0000016 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET link:presentationLink link:calculationLink link:definitionLink 0000017 - Disclosure - OTHER ASSETS link:presentationLink link:calculationLink link:definitionLink 0000018 - Disclosure - ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 0000019 - Disclosure - LONG-TERM DEBT link:presentationLink link:calculationLink link:definitionLink 0000020 - Disclosure - OTHER NON-CURRENT LIABILITIES link:presentationLink link:calculationLink link:definitionLink 0000021 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 0000022 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 0000023 - Disclosure - REVENUE link:presentationLink link:calculationLink link:definitionLink 0000024 - Disclosure - COST OF REVENUE link:presentationLink link:calculationLink link:definitionLink 0000025 - Disclosure - SELLING, GENERAL AND ADMINISTRATIVE EXPENSES link:presentationLink link:calculationLink link:definitionLink 0000026 - Disclosure - OTHER INCOME (EXPENSE), NET link:presentationLink link:calculationLink link:definitionLink 0000027 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 0000028 - Disclosure - (LOSS) EARNINGS PER SHARE link:presentationLink link:calculationLink link:definitionLink 0000029 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS link:presentationLink link:calculationLink link:definitionLink 0000030 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 0000031 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 0000032 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 0000033 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 0000034 - Disclosure - CUSTOMER CONCENTRATION (Tables) link:presentationLink link:calculationLink link:definitionLink 0000035 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 0000036 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000037 - Disclosure - PREMISES AND EQUIPMENT, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 0000038 - Disclosure - RIGHT-OF-USE ASSETS UNDER OPERATING LEASES, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 0000039 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 0000040 - Disclosure - OTHER ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000041 - Disclosure - ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 0000042 - Disclosure - LONG-TERM DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 0000043 - Disclosure - OTHER NON-CURRENT LIABILITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 0000044 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000045 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 0000046 - Disclosure - REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 0000047 - Disclosure - COST OF REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 0000048 - Disclosure - SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Tables) link:presentationLink link:calculationLink link:definitionLink 0000049 - Disclosure - OTHER INCOME (EXPENSE), NET (Tables) link:presentationLink link:calculationLink link:definitionLink 0000050 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 0000051 - Disclosure - (LOSS) EARNINGS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 0000052 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000053 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 0000054 - Disclosure - SUBSEQUENT EVENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 0000055 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES -Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000056 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PP&E Useful Life (Details) link:presentationLink link:calculationLink link:definitionLink 0000057 - Disclosure - CUSTOMER CONCENTRATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000058 - Disclosure - SALE OF BUSINESSES (Details) link:presentationLink link:calculationLink link:definitionLink 0000059 - Disclosure - ACCOUNTS RECEIVABLE, NET - Schedule of Accounts Receivable, Net (Details) link:presentationLink link:calculationLink link:definitionLink 0000060 - Disclosure - ACCOUNTS RECEIVABLE, NET - Schedule of Allowance for Doubtful Accounts and Expected Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 0000061 - Disclosure - PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 0000062 - Disclosure - PREMISES AND EQUIPMENT, NET - Summary of Premise and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 0000063 - Disclosure - PREMISES AND EQUIPMENT, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000064 - Disclosure - PREMISES AND EQUIPMENT, NET - Summary by Country (Details) link:presentationLink link:calculationLink link:definitionLink 0000065 - Disclosure - RIGHT-OF-USE ASSETS UNDER OPERATING LEASES, NET - Summary of Right-of-Use Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0000066 - Disclosure - RIGHT-OF-USE ASSETS UNDER OPERATING LEASES, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000067 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET - Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 0000068 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET - Intangible Assets, Net (Details) link:presentationLink link:calculationLink link:definitionLink 0000069 - Disclosure - GOODWILL AND INTANGIBLE ASSETS, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000070 - Disclosure - OTHER ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 0000071 - Disclosure - ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Accounts Payable and Accrued Expenses - (Details) link:presentationLink link:calculationLink link:definitionLink 0000072 - Disclosure - ACCOUNTS PAYABLE, ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES - Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000073 - Disclosure - LONG-TERM DEBT - Schedule of Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 0000074 - Disclosure - LONG-TERM DEBT - Schedule of Maturities of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 0000075 - Disclosure - LONG-TERM DEBT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000076 - Disclosure - OTHER NON-CURRENT LIABILITIES (Details) link:presentationLink link:calculationLink link:definitionLink 0000077 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Schedule of Fair Values (Details) link:presentationLink link:calculationLink link:definitionLink 0000078 - Disclosure - FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000079 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000080 - Disclosure - SHAREHOLDERS’ EQUITY AND SHARE-BASED COMPENSATION - Pricing Model (Details) link:presentationLink link:calculationLink link:definitionLink 0000081 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Weighted Average Fair Value of Stock Options Granted and Total Intrinsic Value of Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 0000082 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Stock option activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000083 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Stock option information (Details) link:presentationLink link:calculationLink link:definitionLink 0000084 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Market-based options vesting prices (Details) link:presentationLink link:calculationLink link:definitionLink 0000085 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Restricted stock awards (Details) link:presentationLink link:calculationLink link:definitionLink 0000086 - Disclosure - SHAREHOLDERS' EQUITY AND SHARE-BASED COMPENSATION - Assumptions Used to Determine the Fair Values for Performance-Based Awards (Details) link:presentationLink link:calculationLink link:definitionLink 0000087 - Disclosure - REVENUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000088 - Disclosure - REVENUE - Schedule of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 0000089 - Disclosure - REVENUE - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 0000090 - Disclosure - COST OF REVENUE - Components of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 0000091 - Disclosure - COST OF REVENUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000092 - Disclosure - SELLING, GENERAL AND ADMINISTRATIVE EXPENSES (Details) link:presentationLink link:calculationLink link:definitionLink 0000093 - Disclosure - OTHER INCOME (EXPENSE), NET (Details) link:presentationLink link:calculationLink link:definitionLink 0000094 - Disclosure - INCOME TAXES - Components of Income Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 0000095 - Disclosure - INCOME TAXES - Income Tax (Provision) Benefit (Details) link:presentationLink link:calculationLink link:definitionLink 0000096 - Disclosure - INCOME TAXES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000097 - Disclosure - INCOME TAXES - Summary of Tax Effects of Temporary Differences (Details) link:presentationLink link:calculationLink link:definitionLink 0000098 - Disclosure - INCOME TAXES - Reconciliation of Luxembourg Statutory Tax Rate to Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 0000099 - Disclosure - INCOME TAXES - Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 0000100 - Disclosure - (LOSS) EARNINGS PER SHARE - Summary of Basic and Diluted Loss per Share (Details) link:presentationLink link:calculationLink link:definitionLink 0000101 - Disclosure - (LOSS) EARNINGS PER SHARE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000102 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000103 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Lease Term and Assumption (Details) link:presentationLink link:calculationLink link:definitionLink 0000104 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Lease Activity (Details) link:presentationLink link:calculationLink link:definitionLink 0000105 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000105 - Disclosure - COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 0000106 - Disclosure - SEGMENT REPORTING - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000107 - Disclosure - SEGMENT REPORTING - Disaggregation of Revenue by Largest Customer (Details) link:presentationLink link:calculationLink link:definitionLink 0000108 - Disclosure - SEGMENT REPORTING - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 0000109 - Disclosure - SEGMENT REPORTING - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 0000110 - Disclosure - SEGMENT REPORTING - Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 0000111 - Disclosure - SUBSEQUENT EVENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 0000112 - Disclosure - SUBSEQUENT EVENTS - PIK Interest Rate (Details) link:presentationLink link:calculationLink link:definitionLink 0000113 - Disclosure - SUBSEQUENT EVENTS - Schedule of Warrants (Details) link:presentationLink link:calculationLink link:definitionLink