CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 44,496	$ 21,473	$ 80,038	$ 43,215
Cost of revenue	17,669	11,490	34,393	23,256
Gross profit	26,827	9,983	45,645	19,959
Operating expenses:
Research and development	12,067	7,398	23,247	14,422
Selling, general and administrative	12,686	7,856	23,809	15,664
Total operating expenses	24,753	15,254	47,056	30,086
Income (loss) from operations	2,074	(5,271)	(1,411)	(10,127)
Interest expense		(313)		(616)
Other income (expense), net	(28)	(20)	(68)	48
Income (loss) before income taxes	2,046	(5,604)	(1,479)	(10,695)
Income tax (expense) benefit	(23)	1	(63)	(1)
Net income (loss)	2,023	(5,603)	(1,542)	(10,696)
Net income (loss) attributable to common stockholders and comprehensive loss	$ 2,023	$ (5,603)	$ (1,542)	$ (10,696)
Net income (loss) per share attributable to common stockholders, basic	$ 0.11	$ (0.36)	$ (0.08)	$ (0.70)
Net income (loss) per share attributable to common stockholders, diluted	$ 0.10	$ (0.36)	$ (0.08)	$ (0.70)
Weighted-average shares used to compute basic net income (loss) per share	18,942	15,371	18,408	15,191
Weighted-average shares used to compute diluted net income (loss) per share	20,893	15,371	18,408	15,191