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 link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Condensed Consolidated Statements of Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Condensed Consolidated Statements of Stockholders’ Equity link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Condensed Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - Description of Business and Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Revenue link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Property and Equipment, Net link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Goodwill and Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Business Combination link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Supplementary Financial Information link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Stock-Based Compensation​ link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Warrants link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Net loss per share link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Segment Reporting link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - Description of Business and Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Property and Equipment, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Goodwill and Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Business Combination (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Supplementary Financial Information (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Stock-Based Compensation​ (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Warrants (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Net loss per share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Segment Reporting (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Description of Business and Basis of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Revenue - Schedule of Contract Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Fair Value Measurements - Schedule of Fair Value Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - Fair Value Measurements - Schedule of Cash, Cash Equivalents, and Short-Term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Fair Value Measurements - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Fair Value Measurements - Schedule of Key Inputs into the Monte Carlo Simulation Model for the Private Placement Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Fair Value Measurements - Schedule of Change in Fair Value of Private Placement Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Property and Equipment, Net - Schedule of Useful Life for Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Property and Equipment, Net - Schedule of Depreciation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Goodwill and Intangible Assets - Schedule of Purchased Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Goodwill and Intangible Assets - Schedule of Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Goodwill and Intangible Assets - Schedule of Expected Future Annual Amortization Expense of Intangible Asset (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Business Combination - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - Disclosure - Business Combination - Schedule of Total Purchase Consideration (Details) link:presentationLink link:calculationLink link:definitionLink 9955539 - Disclosure - Business Combination - Schedule of Fair Values of Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9955540 - Disclosure - Business Combination - Schedule of Intangible Assets Acquired (Details) link:presentationLink link:calculationLink link:definitionLink 9955541 - Disclosure - Supplementary Financial Information - Schedule of Cash and Cash Equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 9955542 - Disclosure - Supplementary Financial Information -Schedule of Accrued Expenses and Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Debt - Schedule of Long-term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955543 - Disclosure - Debt - Schedule of Long-term Debt Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 9955544 - Disclosure - Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Debt - Schedule of Maturities of Long-term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Commitments and Contingencies - Schedule of Lease Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Commitments and Contingencies - Schedule of Operating Lease Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Commitments and Contingencies - Schedule of Operating Lease Maturities (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Commitments and Contingencies - Schedule of Noncash Lease Activities (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Commitments and Contingencies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Stockholders' Equity (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Stock-Based Compensation​ - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Stock-Based Compensation​ - Schedule of Employee and Non Employee Stock Option (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Stock-Based Compensation​ - Schedule of Restricted Stock Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Stock-Based Compensation​ - Schedule of Share-Based Payment Award, Valuation Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - Disclosure - Stock-Based Compensation​ - Schedule of Stock-based Compensation Expense Included in Respective Expense Category (Details) link:presentationLink link:calculationLink link:definitionLink 9955556 - Disclosure - Warrants - Schedule of Warrant Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955557 - Disclosure - Warrants - United Airlines (Details) link:presentationLink link:calculationLink link:definitionLink 9955558 - Disclosure - Warrants - Stellantis N.V. (Details) link:presentationLink link:calculationLink link:definitionLink 9955559 - Disclosure - Warrants - Liability Classified Warrants (Details) link:presentationLink link:calculationLink link:definitionLink 9955560 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955561 - Disclosure - Net loss per share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Net loss per share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Segment Reporting - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Segment Reporting - Schedule of Financial Information Respect to the Company’s Single Operating Segment (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink