CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net sales	$ 2,921,000	$ 2,812,000
Cost of sales	2,198,000	1,801,000
Gross profit	723,000	1,011,000
Costs and expenses:
Research and development	5,173,000	6,968,000
Sales, general and administrative	5,706,000	10,105,000
Total costs and expenses	10,879,000	17,073,000
Loss from operations	(10,156,000)	(16,062,000)
Other income (expense):
Loss on fair value adjustments	(1,216,000)	0
Foreign currency exchange gain	19,000	233,000
Interest income	200,000	420,000
Other (expense) income, net	(627,000)	45,000
Total other expense, net	(4,074,000)	(733,000)
Net loss before income taxes	(14,230,000)	(16,795,000)
Provision for income taxes	0	0
Net loss	$ (14,230,000)	$ (16,795,000)
Basic net loss per share (in usd per share)	$ (0.74)	$ (1.71)
Diluted net loss per share (in usd per share)	$ (0.74)	$ (1.71)
Basic weighted average shares outstanding (in shares)	19,216	9,830
Diluted weighted average shares outstanding (in shares)	19,216	9,830
Other comprehensive loss:
Net loss	$ (14,230,000)	$ (16,795,000)
Net unrealized gain on debt securities available-for-sale	0	24,000
Foreign currency translation adjustment	(6,000)	(255,000)
Comprehensive loss	(14,236,000)	(17,026,000)
Nonrelated Party
Other income (expense):
Interest expense	(2,450,000)	(418,000)
Related Party
Other income (expense):
Interest expense	$ 0	$ (1,013,000)