Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue:
Total revenue	$ 9,196	$ 7,799	$ 20,578	$ 22,206
Cost of revenue:
Total cost of revenue	5,097	3,740	9,200	10,084
Gross margin	4,099	4,059	11,378	12,122
Operating expenses:
Research and development	2,454	2,668	6,970	8,061
Sales and marketing	3,152	3,097	9,456	9,585
General and administrative	4,838	3,933	12,064	11,011
Total operating expenses	10,444	9,698	28,490	28,657
Operating loss	(6,345)	(5,639)	(17,112)	(16,535)
Other income	5		2	27
Interest income, net	150	270	580	835
Net loss	(6,190)	(5,369)	(16,530)	(15,673)
Cumulative dividend on convertible preferred stock	(328)	(338)	(984)	(1,004)
Net loss attributable to common stockholders	$ (6,518)	$ (5,707)	$ (17,514)	$ (16,677)
Net loss per share attributable to common stockholders:
Basic	$ (0.08)	$ (0.07)	$ (0.21)	$ (0.21)
Diluted	$ (0.08)	$ (0.07)	$ (0.21)	$ (0.21)
Weighted average number of common shares and equivalents:
Basic	85,824,789	82,468,971	84,629,531	80,028,243
Diluted	85,824,789	82,468,971	84,629,531	80,028,243
Systems [Member]
Revenue:
Total revenue	$ 4,391	$ 3,539	$ 7,243	$ 8,673
Cost of revenue:
Total cost of revenue	3,673	2,909	5,760	7,309
Disposables Service and Accessories [Member]
Revenue:
Total revenue	4,805	4,260	13,335	13,533
Cost of revenue:
Total cost of revenue	$ 1,424	$ 831	$ 3,440	$ 2,775