00100 - Statement - Balance Sheets link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Statements of Operations and Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - Statement of Cash Flows link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - Summary of Significant Accounting Policies - Accounts Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Assets and Liabilities Measured on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Balance Sheet Components - Schedule of Inventory (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - Balance Sheet Components - Property and Equipment Net (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - Balance Sheet Components - Schedule of Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Commitments and Contingencies (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - Debt - Carrying Value (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - Debt - Carrying Value (Details) - Cal2 link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - Debt - Summary of Principal Repayments of 2019 Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Income Taxes - Reconciliation Effective Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 41302 - Disclosure - Income Taxes - Deferred tax assets (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Net Loss Per Common Share - Computation of Basic and Diluted Net Loss Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Organization and Operations link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Summary of Significant Accounting Policies 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 - Debt link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - 401 (k) Plan link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Significant Agreements link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Geographic Information link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - Net Loss Per Common Share 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 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 - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Stockholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Geographic Information (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 31403 - Disclosure - Net Loss Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - Summary of Significant Accounting Policies - Schedule of Revenue and Accounts Receivable for Each Significant Customer (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 40205 - Disclosure - Summary of Significant Accounting Policies - Leases (Details) link:presentationLink link:calculationLink link:definitionLink 40206 - Disclosure - Summary of Significant Accounting Policies - Recently issued pronouncements (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Revenue - Disaggregated by Sales Channel (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - Revenue - Disaggregated by Timing of Recognition (Details) link:presentationLink link:calculationLink link:definitionLink 40303 - Disclosure - Revenue - Disaggregated by Type (Details) link:presentationLink link:calculationLink link:definitionLink 40304 - Disclosure - Revenue - Disaggregated by Geographic Region (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Debt - Credit Facility (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Stockholders' Equity - (Details) link:presentationLink link:calculationLink link:definitionLink 40702 - Disclosure - Stockholders’ Equity - Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Stock-Based Compensation - Summary of Options and Awards Activity (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - Stock-Based Compensation - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 40803 - Disclosure - Stock-Based Compensation - Restricted Stock Units (Details) link:presentationLink link:calculationLink link:definitionLink 40804 - Disclosure - Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 40805 - Disclosure - Stock-Based Compensation - Schedule of Fair Value of Employee Stock Options (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Significant Agreements (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Geographic Information (Details) link:presentationLink link:calculationLink link:definitionLink 41303 - Disclosure - Income Taxes - Net operating loss carryforwards and Tax Act (Details) link:presentationLink link:calculationLink link:definitionLink 41402 - Disclosure - Net Loss Per Common Share - Schedule of Potentially Dilutive Securities Excluded from Diluted Net Loss Per Common Share (Details) link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Revenue link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Restructuring link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Restructuring (Details) link:presentationLink link:calculationLink link:definitionLink