CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total revenue	$ 7,887	$ 6,132	$ 23,306	$ 14,680
Cost of sales	5,838	4,931	17,422	12,550
Gross profit	2,049	1,201	5,884	2,130
Operating expenses:
Selling, general and administrative	8,495	5,802	22,400	19,423
Research and development	4,633	4,920	14,310	14,551
Change in fair value of contingent earnout	19	30	12	(478)
Total operating expenses	13,147	10,752	36,722	33,496
Loss from operations	(11,098)	(9,551)	(30,838)	(31,366)
Interest and financing cost, net	(1,076)	(1,080)	(3,224)	(2,877)
Change in fair value of warrant liabilities	(159)	38	(176)	105
Change in fair value of forward obligation	(400)		(550)	478
Loss before income tax benefit	(12,733)	(10,593)	(34,788)	(34,138)
Net loss and comprehensive loss	$ (12,733)	$ (10,593)	$ (34,788)	$ (34,138)
Net loss per share attributable to common stock - basic and diluted	$ (10.33)	$ (8.84)	$ (28.54)	$ (28.58)
Weighted-average shares used in computing net loss per share attributable to common stock - basic and diluted	1,232,921	1,197,919	1,218,815	1,194,562
Product
Total revenue	$ 6,186	$ 4,675	$ 18,166	$ 10,690
Cost of sales	5,260	4,404	15,668	10,973
Gross profit	926	271	2,498	(283)
Operating expenses:
Selling, general and administrative	7,961	5,363	20,893	18,044
Research and development	4,214	4,560	13,075	13,463
Change in fair value of contingent earnout	19	30	12	(478)
Total operating expenses	12,194	9,953	33,980	31,029
Loss from operations	(11,268)	(9,682)	(31,482)	(31,312)
Software
Total revenue	$ 1,701	$ 1,457	$ 5,140	$ 3,990