CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue
Product and service revenue	$ 6,276	$ 6,987	$ 20,840	$ 19,701
Lease	1,472	1,285	4,286	3,536
Total revenue	7,748	8,272	25,126	23,237
Cost of revenue (exclusive of amortization)
Total cost of revenue	3,859	4,421	11,653	11,034
Operating expenses
Selling, general and administrative expenses	6,119	6,523	19,966	18,076
Research and development expenses	1,577	3,184	10,199	8,936
Amortization of intangible assets	276	309	872	931
Operating loss	(4,083)	(6,165)	(17,564)	(15,740)
Other income
Other income, net	92	10	140	41
Net loss	$ (3,991)	$ (6,155)	$ (17,424)	$ (15,699)
Net loss per share:
Basic	$ (0.39)	$ (0.65)	$ (1.73)	$ (1.69)
Diluted	$ (0.39)	$ (0.65)	$ (1.73)	$ (1.69)
Weighted-average number of shares used in calculation of net loss per share:
Basic	10,225	9,439	10,089	9,308
Diluted	10,225	9,439	10,089	9,308
Product
Revenue
Product and service revenue	$ 5,486	$ 6,084	$ 18,188	$ 17,298
Cost of revenue (exclusive of amortization)
Total cost of revenue	2,189	2,915	6,648	7,371
Service
Revenue
Product and service revenue	790	903	2,652	2,403
Cost of revenue (exclusive of amortization)
Total cost of revenue	1,182	1,058	3,559	2,696
Lease
Revenue
Lease	1,472	1,285	4,286	3,536
Cost of revenue (exclusive of amortization)
Total cost of revenue	$ 488	$ 448	$ 1,446	$ 967