Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Revenue	$ 4,170	$ 3,681
Cost of products sold	6,790	6,941
Gross profit	(2,620)	(3,260)
Operating (income) expenses:
Research and development	6,117	8,003
Selling, general and administrative	9,565	14,385
Goodwill impairment	0	12,026
Restructuring	12	949
Change in fair value of contingent consideration	200	7
Gain on sale of business	(1,207)	0
Total operating (income) expenses	14,687	35,370
Loss from operations	(17,307)	(38,630)
Other income (expense):
Change in fair value of warrant liability	(1,446)	0
Interest income	853	24
Interest expense	(1,307)	(1,411)
Total other income (expense), net	992	(1,387)
Loss before income taxes	(16,315)	(40,017)
Income tax benefit	0	0
Net loss	(16,315)	(40,017)
Other comprehensive income (loss)
Unrealized gain (loss) on marketable securities	12	(57)
Foreign currency translation adjustment	59	(166)
Comprehensive loss	$ (16,244)	$ (40,240)
Basic net loss per common share (in dollars per share)	$ (0.57)	$ (1.42)
Diluted net loss per common share (in dollars per share)	$ (0.57)	$ (1.42)
Basic weighted average shares outstanding (in shares)	28,764,444	28,118,090
Diluted weighted average shares outstanding (in shares)	28,764,444	28,118,090