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Stockholders' Equity - Series D Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 15, 2020 | May 08, 2020 | Jun. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Class of Stock [Line Items] |  |  |  |  |
Number of shares called by warrants (in shares) | 2,213,115 |  |  |  |
Months until exercisable | 6 months | 6 months |  |  |
Exercise price of warrants (in dollars per share) | $ 3.05 |  |  | $ 0.01 |
Conversion of stock, shares issued (in shares) |  |  | 1,546,700 |  |
Service receivable |  |  |  | $ 139 | $ 2,171
Deemed dividend recognized on beneficial conversion features of convertible preferred stock | $ 2,700 |  |  |  |
Series D Convertible Preferred Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Shares converted (in shares) |  |  | 154,670 |  |
Service receivable |  | $ 2,300 |  |  |
Deemed dividend recognized on beneficial conversion features of convertible preferred stock |  | 600 |  |  |
Private Placement |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Amount financed under agreement |  | $ 2,300 |  |  |
Number of shares called by warrants (in shares) |  | 859,813 |  |  |
Exercise price of warrants (in dollars per share) |  | $ 1.50 |  |  |
Private Placement | Common Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stock issued (in shares) |  | 602,833 |  |  |
Private Placement | Series D Convertible Preferred Stock |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stock issued (in shares) |  | 154,670 |  |  |

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