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 and Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952156 - Disclosure - BUSINESS AND LIQUIDITY link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - MARKETABLE SECURITIES link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - INVESTMENT IN JOINT VENTURE link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - NET LOSS PER COMMON SHARE link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - SEGMENTS link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - RESTRUCTURING AND SEVERANCE link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - COLLABORATION AND LICENSE AGREEMENTS link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - MARKETABLE SECURITIES (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - NET LOSS PER COMMON SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - SEGMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - RESTRUCTURING AND SEVERANCE (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - BUSINESS AND LIQUIDITY (Details) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES BASIS OF PRESENTATION AND PRINCIPLES OF CONSOLIDATION (Details) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - MARKETABLE SECURITIES - Schedule of Fair Value of Marketable Securities by Type of Security (Details) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - MARKETABLE SECURITIES - Schedule of Marketable Securities by Balance Sheet Location Classification (Details) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - MARKETABLE SECURITIES - Schedule of Fair Values of Available-for-Sale Debt Securities by Contractual Maturity (Details) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - MARKETABLE SECURITIES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Prepaid Expenses and Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - BALANCE SHEET COMPONENTS - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - BALANCE SHEET COMPONENTS - Schedule of Accrued Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - STOCKHOLDERS' EQUITY - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Share-based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Stock Option Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Assumptions of Fair Value of Option Pricing Granted (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - STOCKHOLDERS' EQUITY - Schedule of Nonvested Restricted Common Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - INVESTMENT IN JOINT VENTURE (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - NET LOSS PER COMMON SHARE - Schedule of Basic and Diluted Net Loss Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - NET LOSS PER COMMON SHARE - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - SEGMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - RESTRUCTURING AND SEVERANCE - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - RESTRUCTURING AND SEVERANCE - Schedule of Restructuring and Related Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - COLLABORATION AND LICENSE AGREEMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink