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Significant Accounting Policies and Concentrations of Risk - Net Loss Per Share (Details) - shares | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Significant Accounting Policies and Concentration of Risk [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 54,772,000 | 50,430,000
Outstanding stock options |  |
Significant Accounting Policies and Concentration of Risk [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 35,160,000 | 32,647,000
Restricted Stock Units (RSUs) |  |
Significant Accounting Policies and Concentration of Risk [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 4,589,000 | 2,760,000
Warrants to purchase common stock |  |
Significant Accounting Policies and Concentration of Risk [Line Items] |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 15,023,000 | 15,023,000

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- Definition Significant Accounting Policies and Concentrations of Risk + References No definition available. + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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