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Stockholders' Equity - Equity Offerings and Placements - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 11, 2020 | Dec. 31, 2020 | Dec. 09, 2020 | Nov. 23, 2020 | Dec. 31, 2019 | [1] | Apr. 30, 2019
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  | 5,996,101 | [1] |  |  | 67,091 | 92
Common stock, par value (in dollars per share) |  | $ 0.01 | [1] |  | $ 0.01 | $ 0.01 |
Gross proceeds from issuance of common stock |  | $ 230 |  |  |  |  |
Canaccord Genuity L L C And Roth Capital Partner L L C |  |  |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |
Common stock, shares issued (in shares) | 1,679,031 |  |  |  |  |  |
Shares issued, price per share |  |  |  | $ 13.25 |  |  |
Gross proceeds from issuance of common stock | $ 22,247 |  |  |  |  |  |
Underwriting discount, commission and estimated offering expenses | $ 1,861 |  |  |  |  |  |
[1] | reflects, a one-for-seven hundred (1:700) reverse stock split effected on December 24, 2019.

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