0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Stockholders’ Equity (Deficit) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - REVENUE link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - INTANGIBLE ASSETS AND GOODWILL link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - BORROWINGS link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - EQUITY METHOD INVESTMENT link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - DEFINED CONTRIBUTION PLAN AND BENEFIT PLANS link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - REVENUE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - NET LOSS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Investments, Debt and Equity Securities (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - INTANGIBLE ASSETS AND GOODWILL (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - BORROWINGS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - DEFINED CONTRIBUTION PLAN AND BENEFIT PLANS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable Concentration Risk (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - REVENUE - Disaggregation of Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - REVENUE - Contract Balances on Condensed Consolidated Balance Sheet (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - REVENUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - REVENUE - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - REVENUE - Capitalized Direct Commission Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - NET LOSS PER SHARE - Schedule of Net Loss Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - NET LOSS PER SHARE - Schedule of Potentially Dilutive Securities Excluded from the Calculation of Diluted Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - INVESTMENTS - Debt Securities, Available-for-sale (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - INVESTMENTS - Investments, Maturity Schedule (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - INVESTMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - FAIR VALUE MEASUREMENTS - Fair Value, Assets Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Schedule of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Schedule of Future Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - BALANCE SHEET COMPONENTS - Accounts Receivable, net (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - BALANCE SHEET COMPONENTS - Prepaid Expenses and Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - BALANCE SHEET COMPONENTS - Property and Equipment, net (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - BALANCE SHEET COMPONENTS - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - BALANCE SHEET COMPONENTS - Accrued Expenses and Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - BALANCE SHEET COMPONENTS - Other Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - LEASES - Operating Lease Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - LEASES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - LEASES - Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - LEASES - Maturities of Operating Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - BORROWINGS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - BORROWINGS - Schedule of Vendor Financing Arrangements (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - BORROWINGS - Schedule of Vendor Financing Arrangements (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - COMMON STOCK AND STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - STOCK-BASED COMPENSATION - Shares Available for Future Grant (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - STOCK-BASED COMPENSATION - Summary of Stock Options Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - STOCK-BASED COMPENSATION - Stock Options Valuations Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - STOCK-BASED COMPENSATION - Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - STOCK-BASED COMPENSATION - Stock-Based Compensation Related to Stock-Based Awards to Employees (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - EQUITY METHOD INVESTMENT (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - INCOME TAXES - Schedule of Income (Loss) Before Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - INCOME TAXES - Schedule of Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - INCOME TAXES - Schedule of Effective Income Tax Rate Reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - INCOME TAXES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - INCOME TAXES - Schedule of Unrecognized Tax Benefits (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - DEFINED CONTRIBUTION PLAN AND BENEFIT PLANS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - DEFINED CONTRIBUTION PLAN AND BENEFIT PLANS - Schedule of Net Periodic Pension Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - DEFINED CONTRIBUTION PLAN AND BENEFIT PLANS - Schedule of Changes in Benefit Obligations (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - DEFINED CONTRIBUTION PLAN AND BENEFIT PLANS - Schedule of Weighted-Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9955574 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION - Summary of Revenue by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink 9955575 - Disclosure - SEGMENT AND GEOGRAPHIC INFORMATION - Summary of Property and Equipment by Geographic Area (Details) link:presentationLink link:calculationLink link:definitionLink