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Summary of Significant Accounting Policies - Net Loss Per Share (Details) - shares | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Antidilutive common stock equivalents excluded from computation of diluted net loss per share |  |
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) | 8,735,327 | 16,148,702
Series X Preferred Stock |  |
Antidilutive common stock equivalents excluded from computation of diluted net loss per share |  |
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) | 5,242,501 | 14,346,167
Stock options |  |
Antidilutive common stock equivalents excluded from computation of diluted net loss per share |  |
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) | 1,962,650 | 271,887
Common stock warrants |  |
Antidilutive common stock equivalents excluded from computation of diluted net loss per share |  |
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) | 1,530,176 | 1,063,148
Preferred stock warrants |  |
Antidilutive common stock equivalents excluded from computation of diluted net loss per share |  |
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) |  | 467,500

X
- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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