0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - BASIS OF PRESENTATION link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - ACCOUNTING PRONOUNCEMENTS link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - ACQUISITION link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - ACCOUNT RECEIVABLE, NET link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - DEBT link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - GOODWILL AND INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - NET LOSS ATTRIBUTABLE TO COMMON SHAREHOLDERS link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - PERPETUAL PREFERRED STOCK link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - STOCKHOLDER RIGHTS PLAN link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - SEGMENT AND GEOGRAPHIC DATA link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - CASH, CASH EQUIVALENTS, AND RESTRICTED CASH link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - ACCOUNTING PRONOUNCEMENTS (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - REVENUE RECOGNITION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - ACQUISITION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - ACCOUNT RECEIVABLE, NET (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - DEBT (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - NET LOSS ATTRIBUTABLE TO COMMON SHAREHOLDERS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - SEGMENT AND GEOGRAPHIC DATA (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - DESCRIPTION OF BUSINESS (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - REVENUE RECOGNITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - REVENUE RECOGNITION - Schedule of Changes in Deferred Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - REVENUE RECOGNITION - Schedule of Revenue Disaggregated by Major Source (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - ACQUISITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - ACQUISITION - Schedule of Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - ACQUISITION - Schedule of Pro Forma (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Vesting Conditions (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Stock-based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Restricted Stock Units and Shares (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - ACCOUNT RECEIVABLE, NET - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - ACCOUNT RECEIVABLE, NET - Schedule of Accounts Receivable, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - ACCOUNT RECEIVABLE, NET - Schedule of Total Provision for Expected Credit Losses and Write-offs (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - DEBT - Schedule of Debt Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - DEBT - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - LEASES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - LEASES - Schedule of Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - LEASES - Schedule of Cash Flow Information Related to Lease (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - LEASES - Schedule of Balance Sheet Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - LEASES - Schedule of Operating Leases and Finance Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - LEASES - Schedule of Operating Leases and Finance Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Future Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - GOODWILL AND INTANGIBLE ASSETS - Schedule of Amortization Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - FAIR VALUE MEASUREMENTS - Schedule of Investment in Equity Securities, Gain (Loss) (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - NET LOSS ATTRIBUTABLE TO COMMON SHAREHOLDERS (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - PERPETUAL PREFERRED STOCK (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - STOCKHOLDER RIGHTS PLAN (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - SEGMENT AND GEOGRAPHIC DATA - Segment Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - SEGMENT AND GEOGRAPHIC DATA - Geographic Data Reporting (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION - Schedule of Inventory (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION - Schedule of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION - Schedule of Notes Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - SUPPLEMENTARY BALANCE SHEET INFORMATION - Schedule of Long Term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink