Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues	$ 1,650	$ 1,817	$ 5,356	$ 5,746
Cost of revenues	1,224	1,429	4,209	4,117
Gross profit	426	388	1,147	1,629
Operating expenses:
Research and development	1,086	1,044	3,052	3,388
Selling, general and administrative	3,009	3,377	10,980	10,261
Total operating expenses	4,095	4,421	14,032	13,649
Loss from operations	(3,669)	(4,033)	(12,885)	(12,020)
Interest expense, net	(48)	(455)	(698)	(1,292)
Other income (expense), net	11	12	(2)	16
Net loss and comprehensive loss	(3,706)	(4,476)	(13,585)	(13,296)
Accretion of preferred stock dividends	(349)	2,436	(652)	0
Gain on exchange of Series A for Series A-1 convertible preferred stock	0	0	1,908	0
Net loss applicable to common stockholders	$ (4,055)	$ (2,040)	$ (12,329)	$ (13,296)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (1.82)	$ (2.92)	$ (6.93)	$ (21.48)
Weighted average common shares used to compute net loss per share, basic and diluted (in shares)	2,224	698	1,780	619