0001001 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 1001002 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 1002003 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 1003004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 2101101 - Disclosure - DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 2102102 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 2203201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 2404401 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 2105103 - Disclosure - REVENUE RECOGNITION link:presentationLink link:calculationLink link:definitionLink 2306301 - Disclosure - REVENUE RECOGNITION (Tables) link:presentationLink link:calculationLink link:definitionLink 2407402 - Disclosure - REVENUE RECOGNITION - Contract Balances (Details) link:presentationLink link:calculationLink link:definitionLink 2408403 - Disclosure - REVENUE RECOGNITION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2409404 - Disclosure - REVENUE RECOGNITION - Remaining Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 2409404 - Disclosure - REVENUE RECOGNITION - Remaining Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 2110104 - Disclosure - FAIR VALUE MEASUREMENTS link:presentationLink link:calculationLink link:definitionLink 2311302 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 2412405 - Disclosure - FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 2412405 - Disclosure - FAIR VALUE MEASUREMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 2413406 - Disclosure - FAIR VALUE MEASUREMENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2114105 - Disclosure - INTANGIBLE ASSETS AND GOODWILL link:presentationLink link:calculationLink link:definitionLink 2315303 - Disclosure - INTANGIBLE ASSETS AND GOODWILL (Tables) link:presentationLink link:calculationLink link:definitionLink 2416407 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Carrying Value of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2417408 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2418409 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2419410 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - Summary of Changes in Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 2120106 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 2321304 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 2422411 - Disclosure - LEASES - Components of Lease Right-of-Use Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2423412 - Disclosure - LEASES - Operating Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2424413 - Disclosure - LEASES - Supplemental Information (Details) link:presentationLink link:calculationLink link:definitionLink 2425414 - Disclosure - LEASES - Maturity of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2425414 - Disclosure - LEASES - Maturity of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 2126107 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 2427415 - Disclosure - COMMITMENTS AND CONTINGENCIES - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2128108 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALLS link:presentationLink link:calculationLink link:definitionLink 2329305 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALLS (Tables) link:presentationLink link:calculationLink link:definitionLink 2430416 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALLS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2431417 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALLS - Carrying Amount of the Liability Component (Details) link:presentationLink link:calculationLink link:definitionLink 2432418 - Disclosure - CONVERTIBLE SENIOR NOTES AND CAPPED CALLS - Interest Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2133109 - Disclosure - STOCK-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 2334306 - Disclosure - STOCK-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 2435419 - Disclosure - STOCK-BASED COMPENSATION - Stock-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 2436420 - Disclosure - STOCK-BASED COMPENSATION - Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 2437421 - Disclosure - STOCK-BASED COMPENSATION - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2438422 - Disclosure - STOCK-BASED COMPENSATION - Restricted Stock Units and Performance Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 2439423 - Disclosure - STOCK-BASED COMPENSATION - Assumptions Used In Black-Scholes Model (Details) link:presentationLink link:calculationLink link:definitionLink 2140110 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 2441424 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 2142111 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 2343307 - Disclosure - NET LOSS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 2444425 - Disclosure - NET LOSS PER SHARE - Earnings Per Share, Basic and Diluted (Details) link:presentationLink link:calculationLink link:definitionLink 2445426 - Disclosure - NET LOSS PER SHARE - Antidilutive Securities (Details) link:presentationLink link:calculationLink link:definitionLink 2146112 - Disclosure - GEOGRAPHICAL INFORMATION link:presentationLink link:calculationLink link:definitionLink 2347308 - Disclosure - GEOGRAPHICAL INFORMATION (Tables) link:presentationLink link:calculationLink link:definitionLink 2448427 - Disclosure - GEOGRAPHICAL INFORMATION - (Details) link:presentationLink link:calculationLink link:definitionLink 2149113 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 2450428 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink