Income taxes, Components of Income Tax Provision (Benefit) from Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Components of Net Loss Before Income Taxes [Abstract]
Domestic	$ (27,208)	$ (30,945)
Foreign	(23)	8
Net Loss before Income Taxes	(27,231)	(30,937)
Current [Abstract]
Federal	0	0
State	28	0
Foreign	0	0
Total	28	0
Deferred [Abstract]
Federal	(5,038)	(5,420)
State	(869)	(964)
Foreign	4	1
Change in valuation allowance	5,903	6,383
Total	$ 28	$ 0

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