Foreign Operations (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Revenue from External Customers by Geographic Areas

The financial data by geographic area are as follows (in thousands):

	United States		Germany		United Kingdom		Total
For the Year Ended December 31, 2023:
Revenues by geographic area	$	1,265	$	3,297	$	—	$	4,562
Operating income (loss) by geographic area	$	(23,785)	$	(3,139)	$	(5)	$	(26,929)
Net income (loss) by geographic area	$	(31,232)	$	(3,113)	$	(5)	$	(34,350)
For the Year Ended December 31, 2022:
Revenues by geographic area	$	1,959	$	4,150	$	—	$	6,109
Operating income (loss) by geographic area	$	(13,114)	$	(6,130)	$	—	$	(19,244)
Net income (loss) by geographic area	$	(13,622)	$	(6,060)	$	—	$	(19,682)
As of December 31, 2023:
Identifiable assets by geographic area	$	15,019	$	5,972	$	10	$	21,001
Long lived assets by geographic area	$	775	$	2,350	$	—	$	3,125
Goodwill by geographic area	$	—	$	—	$	—	$	—
As of December 31, 2022:
Identifiable assets by geographic area	$	13,623	$	6,548	$	417	$	20,588
Long lived assets by geographic area	$	1,089	$	3,298	$	—	$	4,387
Goodwill by geographic area	$	—	$	—	$	—	$	—