CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue
Product and service revenue	$ 7,941	$ 5,932
Lease	1,399	1,111
Total revenue	9,340	7,043
Cost of revenue (exclusive of amortization)
Total cost of revenue	4,648	3,149
Operating expenses
Selling, general and administrative expenses	6,278	6,035
Research and development expenses	4,788	2,746
Amortization of intangible assets	309	313
Operating loss	(6,683)	(5,200)
Other income
Other income, net	9	18
Net loss	$ (6,674)	$ (5,182)
Net loss per share:
Basic and diluted	$ (0.67)	$ (0.56)
Weighted-average number of shares used in calculation of net loss per share:
Basic and diluted	9,967	9,187
Product
Revenue
Product and service revenue	$ 6,969	$ 5,158
Cost of revenue (exclusive of amortization)
Total cost of revenue	2,694	2,090
Service
Revenue
Product and service revenue	972	774
Cost of revenue (exclusive of amortization)
Total cost of revenue	1,480	808
Lease
Cost of revenue (exclusive of amortization)
Total cost of revenue	$ 474	$ 251