CONDENSED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Product and service revenue	$ 6,072	$ 6,955	$ 15,579	$ 18,895
Lease	1,073	1,113	2,519	3,173
Total revenue	7,145	8,068	18,098	22,068
Cost of revenue (exclusive of amortization)
Lease	209	520	905	1,787
Total cost of revenue	3,249	4,793	8,688	13,504
Operating expenses
Selling, general and administrative expenses	6,290	3,964	15,110	12,278
Research and development expenses	2,005	4,331	5,010	6,159
Amortization of intangible assets	313	317	944	910
Operating loss	(4,712)	(5,337)	(11,654)	(10,783)
Other income (expense)
Interest expense	(65)	(494)	(1,340)	(1,447)
Other income, net	14	13	48	41
Net loss	(4,763)	(5,818)	(12,946)	(12,189)
Net loss attributable to common stockholders	$ (4,763)	$ (5,818)	$ (12,946)	$ (12,189)
Net loss per share attributable to common stockholders
Basic and diluted	$ (0.64)	$ (5.44)	$ (4.04)	$ (11.39)
Weighted-average number of shares used in calculation of net loss per share:
Basic and diluted	7,464,949	1,070,000	3,201,650	1,070,000
Product
Revenue
Product and service revenue	$ 5,264	$ 6,127	$ 13,360	$ 16,560
Cost of revenue (exclusive of amortization)
Total cost of revenue	2,356	3,551	5,824	9,357
Service
Revenue
Product and service revenue	808	828	2,219	2,335
Cost of revenue (exclusive of amortization)
Total cost of revenue	$ 684	$ 722	$ 1,959	$ 2,360