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 link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - ORGANIZATION AND DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - REVENUE AND CONTRACT BALANCES link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - ACQUISITIONS link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - INTANGIBLE ASSETS link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - RESTRUCTURING link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - REVENUE AND CONTRACT BALANCES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - ACQUISITIONS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - INTANGIBLE ASSETS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Cash, Cash Equivalents, and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - REVENUE AND CONTRACT BALANCES - Schedule of Revenue from External Customers by Geographic Areas (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - REVENUE AND CONTRACT BALANCES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - REVENUE AND CONTRACT BALANCES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - ACQUISITIONS - Observo Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - ACQUISITIONS - Prompt Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - ACQUISITIONS - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - ACQUISITIONS - Schedule of Indefinite-Lived Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - ACQUISITIONS - Prompt and Observo Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS - Schedule of Fair Value of Derivative Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - INTANGIBLE ASSETS - Schedule of Intangible Assets, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - INTANGIBLE ASSETS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - INTANGIBLE ASSETS - Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Stock-based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - STOCKHOLDERS' EQUITY - Stock-Based Compensation Expense Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Performance Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - STOCKHOLDERS' EQUITY - Restricted Stock Units, Performance Stock Units and Stock Options Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - STOCKHOLDERS' EQUITY - Employee Stock Purchase Plan Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Restricted Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - STOCKHOLDERS' EQUITY - Restricted Common Stock Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - STOCKHOLDERS' EQUITY - Modification Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - RESTRUCTURING - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS - Schedule of Earnings Per Share, Basic and Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink