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Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 2204201 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 2305301 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 2406402 - Disclosure - Summary of Significant Accounting Policies - Segments (Details) link:presentationLink link:calculationLink link:definitionLink 2407403 - Disclosure - Summary of Accounting Policies - Accounts Receivable and Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 2408404 - Disclosure - Summary of Significant Accounting Policies - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 2409405 - Disclosure - Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2410406 - Disclosure - Summary of Significant Accounting Policies - Revenue Recognition (Details) link:presentationLink link:calculationLink link:definitionLink 2411407 - Disclosure - Summary of Significant Accounting Policies - Warranty Program (Details) link:presentationLink link:calculationLink link:definitionLink 2412408 - Disclosure - Summary of Significant Accounting Policies - Advertising Expenditures (Details) link:presentationLink link:calculationLink link:definitionLink 2413409 - Disclosure - Summary of Accounting Policies - Recently Adopted Accounting Standards (Details) link:presentationLink link:calculationLink link:definitionLink 2114103 - Disclosure - Marketable Securities link:presentationLink link:calculationLink link:definitionLink 2315302 - Disclosure - Marketable Securities (Tables) link:presentationLink link:calculationLink link:definitionLink 2416410 - Disclosure - Marketable Securities (Details) link:presentationLink link:calculationLink link:definitionLink 2117104 - Disclosure - Fair Value Measurement link:presentationLink link:calculationLink link:definitionLink 2318303 - Disclosure - Fair Value Measurement (Tables) link:presentationLink link:calculationLink link:definitionLink 2419411 - Disclosure - Fair Value Measurement - Marketable Securities Measured at Fair Value on Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 2120105 - Disclosure - Balance Sheet Components link:presentationLink link:calculationLink link:definitionLink 2321304 - Disclosure - Balance Sheet Components (Tables) link:presentationLink link:calculationLink link:definitionLink 2422412 - Disclosure - Balance Sheet Components - Property and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 2423413 - Disclosure - Balance Sheet Components - Accrued Liabilities and Other (Details) link:presentationLink link:calculationLink link:definitionLink 2124106 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 2325305 - 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Disclosure - Borrowings - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2433419 - Disclosure - Borrowings - Annual Future Minimum Principal Payments (Details) link:presentationLink link:calculationLink link:definitionLink 2134108 - Disclosure - Warrants link:presentationLink link:calculationLink link:definitionLink 2335307 - Disclosure - Warrants (Tables) link:presentationLink link:calculationLink link:definitionLink 2436420 - Disclosure - Warrants - Issued and Outstanding (Details) link:presentationLink link:calculationLink link:definitionLink 2137109 - Disclosure - Common and Preferred Stock link:presentationLink link:calculationLink link:definitionLink 2438421 - Disclosure - Common and Preferred Stock - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2139110 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 2340308 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 2441422 - 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Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 2456432 - Disclosure - Income Taxes - Components of Loss Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 2457433 - Disclosure - Income Taxes - Components of Deferred Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 2458434 - Disclosure - Income Taxes - Reconciliation of Effective Income Tax Rate (Details) link:presentationLink link:calculationLink link:definitionLink 2459435 - Disclosure - Income Taxes - Temporary Differences and Carryforwards and Deferred Tax Assets (Details) link:presentationLink link:calculationLink link:definitionLink 2460436 - Disclosure - Income Taxes - Changes in Valuation Allowance (Details) link:presentationLink link:calculationLink link:definitionLink 2461437 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 2462438 - Disclosure - Income Taxes - Uncertain Income Tax Positions (Details) link:presentationLink link:calculationLink link:definitionLink 2163114 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 2464439 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink