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Stockholders' Equity - Common Stock Issuances - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 05, 2020 | Feb. 28, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Proceeds on Public Offering (1) | [1] |  |  |  | $ 39,764 |
Compensation expense for issuance of restricted stock (in shares) |  |  |  |  | 72,976 | 22,963
Common stock grant date fair value |  |  |  |  | $ 635 | $ 229
Gross proceeds from issuance of common stock |  |  |  | $ 2,458 |  |
Exercise of pre-funded Series D Warrants (in shares) |  |  |  |  | 6,000 |
Stock issued during period shares associated other warrants |  |  |  |  | 185,803 |
Proceeds from exercise of warrants |  |  |  | $ 2,458 | $ 1,858 |
Stock Issued During Period Shares Associated With Warrants |  |  |  | 465,173 |  |
Issue Of Unregistered Common Stock For Advisory Services |  |  | 2,636 |  |  |
Series F warrants [Member] |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Warrants issued to purchase of common stock |  | 2,224,900 |  |  |  |
Warrant exercise price |  | $ 10.00 |  |  |  |
Pre-Funded Warrants [Member] |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Warrants issued to purchase of common stock |  | 377,000 |  | 215,000 |  |
Warrant exercise price |  |  |  | $ 0.01 |  |
Common Stock [Member] |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Shares issued in public offering |  |  |  | 515,000 | 77,644 |
Proceeds on Public Offering (1) |  | $ 21,996 |  |  |  |
Underwriting discounts and other offering expenses |  | $ 2,618 |  |  |  |
Common Stock [Member] | IPO [Member] |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Shares issued in public offering |  | 1,823,000 |  |  |  |
2019 Warrants [Member] |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |
Warrant exercise price |  | $ 10.00 |  | $ 10.00 |  |
[1] | Includes gross proceeds of $44,243, less total issuance costs of $4,479.

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