Risks and Uncertainties - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 15, 2019
Unusual Risk or Uncertainty [Line Items]
Cash and cash equivalents	$ 31,807	$ 28,024	$ 31,807	$ 49,326
Accumulated deficit	$ 186,257	$ 256,796	$ 186,257
Common Stock
Unusual Risk or Uncertainty [Line Items]
Common Stock issued upon public equity offering (in shares)		6,550,486	930,933
Equity Distribution Agreement
Unusual Risk or Uncertainty [Line Items]
Number of shares issued in transaction (in shares)	930,993
Consideration received on sale of stock	$ 6,055
Payments of stock issuance costs	$ 473
At The Market Offering
Unusual Risk or Uncertainty [Line Items]
Consideration received on sale of stock		$ 29,778
Payments of stock issuance costs		1,291
Remaining amount available for offering		$ 37,408
Senior Secured Notes Due 2025 | Senior Notes
Unusual Risk or Uncertainty [Line Items]
Interest rate					12.50%