CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 35,542	$ 21,742
Cost of revenue	16,725	11,766
Gross profit	18,817	9,976
Operating expenses:
Research and development	11,180	7,024
Selling, general and administrative	11,123	7,808
Total operating expenses	22,303	14,832
Loss from operations	(3,486)	(4,856)
Interest expense		(303)
Other (expense) income, net	(39)	68
Loss before income taxes	(3,525)	(5,091)
Income tax expense	(40)	(2)
Net loss	(3,565)	(5,093)
Net loss attributable to common stockholders and comprehensive loss	$ (3,565)	$ (5,093)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.20)	$ (0.34)
Weighted-average shares used to compute basic and diluted net loss per share	17,868	15,010