Restructuring - Narrative (Details) $ in Thousands		1 Months Ended				3 Months Ended								12 Months Ended
	Dec. 01, 2020 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Apr. 30, 2021 USD ($)	Jan. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Aug. 30, 2020 creditFacility	Aug. 11, 2020 creditFacility	Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Net loss						$ (2,631)	$ (1,140)	$ (2,473)	$ (1,642)	$ 65	$ (1,165)	$ (4,340)	$ (541)	$ (7,886)	$ (5,981)
Net cash used in operating activities														(9,765)	(2,451)
Restructuring														(21)	(60)
Proceeds from bridge financing				$ 1,500
Number of new credit facilities | creditFacility																2	2
Stockholders' equity		$ 6,209				$ 6,209				$ 4,255		$ 1,714		$ 6,209	4,255			$ 3,996
Warrant liability - modification	$ 1,400														$ 1,405
December 2021 Private Placement
Restructuring Cost and Reserve [Line Items]
Net proceeds from sale of common stock and warrants		$ 4,000
Equity Offering
Restructuring Cost and Reserve [Line Items]
Net proceeds from sale of common stock and warrants			$ 4,500
January 2020 Equity Offering
Restructuring Cost and Reserve [Line Items]
Net proceeds from sale of common stock and warrants					$ 2,300