CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue
Product and service revenue	$ 6,623	$ 6,782	$ 14,564	$ 12,714
Lease	1,415	1,140	2,814	2,251
Total revenue	8,038	7,922	17,378	14,965
Cost of revenue (exclusive of amortization)
Total cost of revenue	3,146	3,464	7,794	6,613
Operating expenses
Selling, general and administrative expenses	7,569	5,518	13,847	11,553
Research and development expenses	3,834	3,006	8,622	5,752
Amortization of intangible assets	287	309	596	622
Operating loss	(6,798)	(4,375)	(13,481)	(9,575)
Other income
Other income, net	39	13	48	31
Net loss	$ (6,759)	$ (4,362)	$ (13,433)	$ (9,544)
Net loss per share:
Basic	$ (0.67)	$ (0.47)	$ (1.34)	$ (1.03)
Diluted	$ (0.67)	$ (0.47)	$ (1.34)	$ (1.03)
Weighted-average number of shares used in calculation of net loss per share:
Basic	10,073	9,296	10,020	9,242
Diluted	10,073	9,296	10,020	9,242
Product
Revenue
Product and service revenue	$ 5,733	$ 6,056	$ 12,702	$ 11,214
Cost of revenue (exclusive of amortization)
Total cost of revenue	1,765	2,366	4,459	4,456
Service
Revenue
Product and service revenue	890	726	1,862	1,500
Cost of revenue (exclusive of amortization)
Total cost of revenue	897	830	2,377	1,638
Lease
Cost of revenue (exclusive of amortization)
Total cost of revenue	$ 484	$ 268	$ 958	$ 519