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Reserved for Future Issuance (Details) - shares | Sep. 30, 2022 | Dec. 31, 2021
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Stockholders' Equity |  |
Number of shares reserved for future issuance | 10,088,822 | 9,784,254
Series X Preferred Stock |  |
Stockholders' Equity |  |
Number of shares reserved for future issuance | 5,242,501 | 5,242,501
Warrants for the purchase of common stock |  |
Stockholders' Equity |  |
Number of shares reserved for future issuance | 1,530,176 | 1,530,380
Options outstanding to purchase common stock |  |
Stockholders' Equity |  |
Number of shares reserved for future issuance | 2,237,948 | 1,346,733
Reserve under the 2015 Stock Incentive Plan and the 2022 Inducement Stock Incentive Plan |  |
Stockholders' Equity |  |
Number of shares reserved for future issuance | 1,041,215 | 1,633,736
Shares reserved for the employee stock purchase plan |  |
Stockholders' Equity |  |
Number of shares reserved for future issuance | 36,982 | 30,904

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