Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue:
Total revenue	$ 6,548	$ 7,037
Cost of revenue:
Total cost of revenue	2,672	2,113
Gross margin	3,876	4,924
Operating expenses:
Research and development	2,746	2,447
Sales and marketing	3,148	2,946
General and administrative	3,601	3,620
Total operating expenses	9,495	9,013
Operating loss	(5,619)	(4,089)
Interest income, net	272	3
Net loss	(5,347)	(4,086)
Cumulative dividend on convertible preferred stock	(331)	(331)
Net loss attributable to common stockholders	$ (5,678)	$ (4,417)
Net loss per share attributable to common stockholders:
Basic	$ (0.07)	$ (0.06)
Diluted	$ (0.07)	$ (0.06)
Weighted average number of common shares and equivalents:
Basic	76,500,965	75,877,391
Diluted	76,500,965	75,877,391
Systems [Member]
Revenue:
Total revenue	$ 1,821	$ 1,634
Cost of revenue:
Total cost of revenue	1,697	1,292
Disposables Service And Accessories [Member]
Revenue:
Total revenue	4,727	5,403
Cost of revenue:
Total cost of revenue	$ 975	$ 821