Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Total revenue	$ 28,147	$ 35,021
Cost of revenue:
Total cost of revenue	9,677	11,789
Gross margin	18,470	23,232
Operating expenses:
Research and development	10,558	10,199
Sales and marketing	12,325	11,948
General and administrative	14,363	13,973
Total operating expenses	37,246	36,120
Operating loss	(18,776)	(12,888)
Interest income (expense), net	484	(11)
Gain on extinguishment of debt		2,183
Net loss	(18,292)	(10,716)
Cumulative dividend on convertible preferred stock	(1,343)	(1,345)
Net loss attributable to common stockholders	$ (19,635)	$ (12,061)
Net loss per share attributable to common stockholders:
Basic	$ (0.26)	$ (0.16)
Diluted	$ (0.26)	$ (0.16)
Weighted average number of common shares and equivalents:
Basic	76,061,183	75,558,233
Diluted	76,061,183	75,558,233
Systems [Member]
Revenue:
Total revenue	$ 6,845	$ 11,168
Cost of revenue:
Total cost of revenue	5,802	7,527
Disposables Service And Accessories [Member]
Revenue:
Total revenue	21,302	22,867
Cost of revenue:
Total cost of revenue	3,875	3,276
Sublease [Member]
Revenue:
Total revenue		986
Cost of revenue:
Total cost of revenue		$ 986