Foreign Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Operating income (loss) by geographic area	$ (26,929)	$ (19,244)
Identifiable assets by geographic area	23,769	57,635
Continuing Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	4,562	6,109
Operating income (loss) by geographic area	(26,929)	(19,244)
Net income (loss) by geographic area	(34,350)	(19,682)
Identifiable assets by geographic area	21,001	20,588
Long lived assets by geographic area	3,125	4,387
Goodwill by geographic area	0	0
United States | Reportable Geographical Components | Continuing Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	1,265	1,959
Operating income (loss) by geographic area	(23,785)	(13,114)
Net income (loss) by geographic area	(31,232)	(13,622)
Identifiable assets by geographic area	15,019	13,623
Long lived assets by geographic area	775	1,089
Goodwill by geographic area	0	0
Germany | Reportable Geographical Components | Continuing Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	3,297	4,150
Operating income (loss) by geographic area	(3,139)	(6,130)
Net income (loss) by geographic area	(3,113)	(6,060)
Identifiable assets by geographic area	5,972	6,548
Long lived assets by geographic area	2,350	3,298
Goodwill by geographic area	0	0
United Kingdom | Reportable Geographical Components | Continuing Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues by geographic area	0	0
Operating income (loss) by geographic area	(5)	0
Net income (loss) by geographic area	(5)	0
Identifiable assets by geographic area	10	417
Long lived assets by geographic area	0	0
Goodwill by geographic area	$ 0	$ 0