CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Net sales	$ 11,698	$ 12,059
Cost of sales:
Cost of sales of products and services	8,994	8,325
Inventory write-down	0	1,184
Total cost of sales	8,994	9,509
Gross profit	2,704	2,550
Costs and expenses:
Research and development	16,688	25,353
Sales, general and administrative	21,326	31,225
Total costs and expenses	38,014	56,578
Loss from operations	(35,310)	(54,028)
Other (expense) income:
Gain on extinguishment of accounts payable	743	0
(Loss) gain on fair value adjustment	(1,971)	12,955
Foreign currency exchange (loss) gain	(564)	71
Interest income	703	1,123
Other (expense) income, net	(595)	108
Total other expense, net	(14,801)	(6,740)
Net loss before income taxes	(50,111)	(60,768)
(Provision) benefit for income taxes	66	(850)
Net loss	$ (50,045)	$ (61,618)
Basic net loss per share (in dollars per share)	$ (2.15)	$ (4.94)
Diluted net loss per share ( in dollars per share)	$ (2.15)	$ (4.94)
Weighted average shares outstanding, basic (in shares)	23,302	12,477
Weighted average shares outstanding, diluted (in shares)	23,302	12,477
Other comprehensive loss:
Net loss	$ (50,045)	$ (61,618)
Net unrealized gain on available-for-sale investments	0	29
Foreign currency translation adjustment	606	(241)
Comprehensive loss	(49,439)	(61,830)
Nonrelated Party
Other (expense) income:
Interest expense	(13,117)	(5,926)
Loss on extinguishment of debt	0	(6,499)
Related Party
Other (expense) income:
Interest expense	0	(1,817)
Loss on extinguishment of debt	$ 0	$ (6,755)