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Risks and Uncertainties - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended | 25 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2020 | Jul. 15, 2019
Unusual Risk or Uncertainty [Line Items] |  |  |  |  |
Cash and cash equivalents | $ 27,273 | $ 28,024 | $ 27,273 | $ 31,807 |
Accumulated deficit | 311,207 | 256,796 | $ 311,207 |  |
Cost of common stock issued under equity offering | $ (289) | $ (1,291) |  |  |
Common Stock |  |  |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |  |  |
Common stock issued under equity offering (in shares) | 2,860,538 | 6,550,486 |  |  |
At The Market Offering |  |  |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |  |  |
Number of shares issued in transaction (in shares) |  |  | 10,341,957 |  |
Consideration received on sale of stock | $ 3,907 | $ 29,778 | $ 39,740 |  |
Payments of stock issuance costs |  |  | $ 2,053 |  |
Remaining amount available for offering | $ 33,416 |  |  |  |
Senior Secured Notes Due 2025 |  |  |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |  |  |
Interest rate | 12.50% |  | 12.50% |  |
Senior Secured Notes Due 2025 | Senior Notes |  |  |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |  |  |
Interest rate | 12.50% |  | 12.50% |  | 12.50%

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