00100 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - SCHEDULE OF FAIR VALUE INSTRUMENTS (Details) link:presentationLink link:calculationLink link:definitionLink 40303 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - SCHEDULE OF SHORT-TERM INVESTMENTS WITH UNREALIZED LOSSES (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - BALANCE SHEET COMPONENTS - SCHEDULE OF PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - BALANCE SHEET COMPONENTS - SCHEDULE OF ACCRUED AND OTHER CURRENT LIABILITIES - (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - COMMITMENTS AND CONTINGENCIES - SCHEDULE OF FUTURE MINIMUM ANNUAL LEASE PAYMENTS FOR OPERATING LEASES (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - COMMITMENTS AND CONTINGENCIES - SCHEDULE OF FUTURE MINIMUM ANNUAL LEASE PAYMENTS FOR OPERATING LEASES (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 40504 - Disclosure - COMMITMENTS AND CONTINGENCIES - SCHEDULE OF RENT EXPENSES (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - INCOME TAXES - SUMMARY OF COMPONENTS OF NET DEFERRED TAX ASSETS (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - INCOME TAXES - SUMMARY OF RECONCILIATION OF FEDERAL INCOME TAX RATE (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - SEGMENT REPORTING (Details) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - SCHEDULE OF NET LOSS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - SCHEDULE OF POTENTIALLY DILUTIVE SECURITIES NOT INCLUDED IN THE CALCULATION OF DILUTED NET LOSS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - SCHEDULE OF SHORT TERM INVESTMENT (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - BALANCE SHEET COMPONENTS - WORKFORCE REDUCTION PLAN (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - STOCKHOLDERS' EQUITY (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - STOCKHOLDERS' EQUITY - SCHEDULE OF COMMON STOCK SHARES RESERVED FOR ON AND AS-CONVERTED BASIS, FOR FUTURE ISSUANCE (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - SHARE-BASED COMPENSATION (Details) link:presentationLink link:calculationLink link:definitionLink 40703 - Disclosure - SHARE-BASED COMPENSATION - SCHEDULE OF UNVESTED RESTRICTED STOCK UNIT ACTIVITY (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - SHARE-BASED COMPENSATION - SCHEDULE OF FAIR VALUE OF STOCK OPTIONS ASSUMPTIONS (Details) link:presentationLink link:calculationLink link:definitionLink 40705 - Disclosure - SHARE-BASED COMPENSATION - SCHEDULE OF STOCK-BASED COMPENSATION EXPENSE (Details) link:presentationLink link:calculationLink link:definitionLink 40706 - Disclosure - SHARE-BASED COMPENSATION - SCHEDULE OF STOCK-BASED COMPENSATION EXPENSE BY TYPE OF AWARDS (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - BALANCE SHEET COMPONENTS link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - SHARE-BASED COMPENSATION link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - BALANCE SHEET COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - STOCKHOLDERS' EQUITY (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - SHARE-BASED COMPENSATION (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - SEGMENT REPORTING (Tables) link:presentationLink link:calculationLink link:definitionLink 40503 - Disclosure - COMMITMENTS AND CONTINGENCIES - SCHEDULE OF SUPPLEMENTAL CASH FLOW (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - SHARE-BASED COMPENSATION - SCHEDULE OF OPTION ACTIVITY UNDER 2021 PLAN AND 2018 PLAN (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - INCOME TAXES - SUMMARY OF GROSS UNRECOGNIZED TAX BENEFITS (Details) link:presentationLink link:calculationLink link:definitionLink 99900 - Disclosure - Standard And Custom Axis Domain Defaults link:presentationLink link:calculationLink link:definitionLink