00100 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Condensed Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - Condensed Consolidated Statements of Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 00500 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Cash, Cash equivalents and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - BALANCE SHEET COMPONENTS - Accrued liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - BALANCE SHEET COMPONENTS - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - INCOME TAXES - Rate reconciliation (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - INCOME TAXES - Expense components (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - LEASES - Company's right-of-use asset and lease liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - LEASES - components of lease expenses (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - LEASES - maturities of the Company's operating lease liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - LEASES - maturities of the Company's operating lease liabilities (Details) Calc 2 link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - Condensed Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - GENERAL ORGANIZATION AND BUSINESS (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Useful lives, impairment (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Loss per share (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Fair value (Details) link:presentationLink link:calculationLink link:definitionLink 40205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Stock-based compensation expense (Details) link:presentationLink link:calculationLink link:definitionLink 40206 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Stock-based compensation by instrument (Details) link:presentationLink link:calculationLink link:definitionLink 40207 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Concentrations, etc. (Details) link:presentationLink link:calculationLink link:definitionLink 40208 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - CASH AND CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - CASH AND CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS - Short-term investments (Details) link:presentationLink link:calculationLink link:definitionLink 40303 - Disclosure - CASH AND CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS - Cost and fair value (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - BALANCE SHEET COMPONENTS - Other information (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - STOCKHOLDERS' EQUITY - Warrant activity (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - STOCKHOLDERS' EQUITY - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - STOCK BASED COMPENSATION - Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - STOCK BASED COMPENSATION - Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - STOCK BASED COMPENSATION - Exercise price (Details) link:presentationLink link:calculationLink link:definitionLink 40604 - Disclosure - STOCK BASED COMPENSATION - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - EMPLOYEE BENEFIT PLAN (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - INCOME TAXES - Unrecognized benefits (Details) link:presentationLink link:calculationLink link:definitionLink 40805 - Disclosure - INCOME TAXES - Other information (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - LICENSES AND AGREEMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - LEASES - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - LEGAL PROCEEDINGS (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - QUARTERLY UNAUDITED RESULTS (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - RELATED PARTY TRANSACTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - GENERAL ORGANIZATION AND BUSINESS link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - CASH AND CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - STOCK BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - EMPLOYEE BENEFIT PLAN link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - LICENSES AND AGREEMENTS link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - LEASES link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - LEGAL PROCEEDINGS link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - QUARTERLY UNAUDITED RESULTS link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - RELATED PARTY TRANSACTIONS link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES (Policies) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING PRACTICES (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - CASH AND CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - STOCK BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - LEASES (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - QUARTERLY UNAUDITED RESULTS (Tables) link:presentationLink link:calculationLink link:definitionLink