CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues, net	$ 233	$ 195
Cost of sales	141	105
Gross profit	92	90
Operating expenses:
Research and development	387	516
Selling, general and administrative	1,750	1,907
Total operating expenses	2,137	2,423
Loss from operations	(2,045)	(2,333)
Other income (expense):
Interest income	8	2
Interest expense	0	(1)
Other income, net	8	1
Net loss	(2,037)	(2,332)
Comprehensive loss	$ (2,037)	$ (2,332)
Weighted average shares outstanding - basic (in shares)	1,538,514	610,450
Weighted average shares outstanding - diluted (in shares)	1,538,514	610,450
Net loss per share - basic (in dollars per share)	$ (1.32)	$ (3.82)
Net loss per share - diluted (in dollars per share)	$ (1.32)	$ (3.82)