Liquidity and Going Concern Uncertainty (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Apr. 10, 2020
Line of Credit Facility [Line Items]
Cash	$ 3,964	$ 2,059	$ 5,058
Working capital	1,689
Net loss	3,433	3,129
Net cash used in operating activities	1,235	$ 2,536
PPP Loan
Line of Credit Facility [Line Items]
Long term debt	$ 2,417		$ 2,417	$ 2,417