Liquidity and Going Concern Uncertainty (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Apr. 10, 2020
Line of Credit Facility [Line Items]
Cash	$ 13,033		$ 4,141		$ 13,033	$ 4,141	$ 5,058
Working capital	13,999				13,999
Net loss	2,246	$ 3,433	$ 3,385	$ 3,129	5,679	6,514
Net cash used in operating activities					3,670	$ 2,857
PPP Loan
Line of Credit Facility [Line Items]
Long term debt	$ 2,417				$ 2,417		$ 2,417	$ 2,417