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 00405 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Calc2 link:presentationLink link:calculationLink link:definitionLink 40205 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Inventory) (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - BALANCE SHEETS COMPONENTS - Prepaid expenses (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - BALANCE SHEETS COMPONENTS - Other Current Assets (Details) link:presentationLink link:calculationLink link:definitionLink 40303 - Disclosure - BALANCE SHEETS COMPONENTS - Other Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40304 - Disclosure - BALANCE SHEETS COMPONENTS - Other Long-term Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40305 - Disclosure - BALANCE SHEETS COMPONENTS Property, Plant, and Equipment, net (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - COMMITMENTS AND CONTINGENCIES - Future Minimum Payments (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - COMMITMENTS AND CONTINGENCIES - Estimated Purchase Commitment (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - COMMITMENTS AND CONTINGENCIES - Future Minimum Payments for Capital Lease (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - NET LOSS PER SHARE (Details) link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - DESCRIPTION OF BUSINESS link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - BALANCE SHEETS COMPONENTS link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - CONVERTIBLE NOTES link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - CONTINGENT FORWARD CONTRACTS link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - CONVERTIBLE PREFERRED SHARE WARRANT LIABILITY link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - SHARES-BASED AWARDS link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - COMMITMENTS AND CONTINGENCIES link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - INCOME TAXES link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - NET LOSS PER SHARE link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - EMPLOYEE BENEFIT PLAN link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - SEGMENT REPORTING link:presentationLink link:calculationLink link:definitionLink 11501 - Disclosure - SUBSEQUENT EVENTS link:presentationLink link:calculationLink link:definitionLink 20202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - BALANCE SHEETS COMPONENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - CONVERTIBLE NOTES (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - CONTINGENT FORWARD CONTRACTS (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - CONVERTIBLE PREFERRED SHARE WARRANT LIABILITY (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - SHARES-BASED AWARDS (Tables) link:presentationLink link:calculationLink link:definitionLink 31001 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - INCOME TAXES (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - NET LOSS PER SHARE (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - DESCRIPTION OF BUSINESS (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Cash and Cash equivalents) (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Short Term Investment) (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Property, Plant, and Equipment) (Details) link:presentationLink link:calculationLink link:definitionLink 40206 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details) link:presentationLink link:calculationLink link:definitionLink 40306 - Disclosure - BALANCE SHEETS COMPONENTS - Property, Plant, and Equipment, net - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS- Company's Financial Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Reconciliation of the Contingent Forward Contract Liability (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - FAIR VALUE OF FINANCIAL INSTRUMENTS - Reconciliation of the Convertible Preferred Share Warrant Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - CONVERTIBLE NOTES (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - CONVERTIBLE NOTES - Interest Expense Information (Details) link:presentationLink link:calculationLink link:definitionLink 40503 - Disclosure - CONVERTIBLE NOTES - Conversion details (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - CONTINGENT FORWARD CONTRACTS (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - CONTINGENT FORWARD CONTRACTS - Series D contingent forward contract liability (Details) link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - CONTINGENT FORWARD CONTRACTS - Series D convertible preferred shares (Details) link:presentationLink link:calculationLink link:definitionLink 40604 - Disclosure - CONTINGENT FORWARD CONTRACTS - Series E convertible preferred shares (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - CONVERTIBLE PREFERRED SHARE WARRANT LIABILITY (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - CONVERTIBLE PREFERRED SHARE WARRANT LIABILITY - Convertible preferred share warrants (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - First Company Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Second Company Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Fair value of Contingent (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Repurchase Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 40805 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Convertible preferred shares (Details) link:presentationLink link:calculationLink link:definitionLink 40806 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Third Company Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 40807 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Fourth Company Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 40808 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Fifth Company Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 40809 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Series D Preferred Share Issuance (Details) link:presentationLink link:calculationLink link:definitionLink 40810 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - PIF Convertible Notes (Details) link:presentationLink link:calculationLink link:definitionLink 40811 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Convertible Preferred Stock (Details) link:presentationLink link:calculationLink link:definitionLink 40812 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40813 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 40814 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Liquidation (Details) link:presentationLink link:calculationLink link:definitionLink 40815 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Automatic Conversion (Details) link:presentationLink link:calculationLink link:definitionLink 40816 - Disclosure - CONVERTIBLE PREFERRED SHARES AND SHAREHOLDERS' DEFICIT - Shares (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - SHARES-BASED AWARDS (Details) link:presentationLink link:calculationLink link:definitionLink 40902 - Disclosure - SHARES-BASED AWARDS - Summary of share options (Details) link:presentationLink link:calculationLink link:definitionLink 40903 - Disclosure - SHARES-BASED AWARDS - Additional information (Details) link:presentationLink link:calculationLink link:definitionLink 40904 - Disclosure - SHARES-BASED AWARDS - Assumptions used in the valuation (Details) link:presentationLink link:calculationLink link:definitionLink 40905 - Disclosure - SHARES-BASED AWARDS - Statements of operations (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - COMMITMENTS AND CONTINGENCIES - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 41005 - Disclosure - COMMITMENTS AND CONTINGENCIES - Indemnification (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - INCOME TAXES - Components of loss before income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - INCOME TAXES - Components of Company's income tax provision (Details) link:presentationLink link:calculationLink link:definitionLink 41103 - Disclosure - INCOME TAXES - Components of the Company's deferred taxes (Details) link:presentationLink link:calculationLink link:definitionLink 41104 - Disclosure - INCOME TAXES - Significant components of the Company's deferred taxes (Details) link:presentationLink link:calculationLink link:definitionLink 41105 - Disclosure - INCOME TAXES (Details) link:presentationLink link:calculationLink link:definitionLink 41106 - Disclosure - INCOME TAXES - Reconciliation of taxes at the federal statutory rate to our provision for income taxes (Details) link:presentationLink link:calculationLink link:definitionLink 41107 - Disclosure - INCOME TAXES - Activity related to unrecognized tax benefits (Details) link:presentationLink link:calculationLink link:definitionLink 41108 - Disclosure - INCOME TAXES - Recognized interest expense and penalty expense as part of income tax expenses in the consolidated statements of operations (Details) link:presentationLink link:calculationLink link:definitionLink 41202 - Disclosure - NET LOSS PER SHARE - Potential common shares (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - EMPLOYEE BENEFIT PLAN (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - SEGMENT REPORTING (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - SUBSEQUENT EVENTS (Details) link:presentationLink link:calculationLink link:definitionLink 41502 - Disclosure - SUBSEQUENT EVENTS - Employee Stock Purchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 41503 - Disclosure - SUBSEQUENT EVENTS - Public Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink