CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 45,248	$ 47,822
Cost of revenue	23,267	26,428
Gross profit	21,981	21,394
Operating expenses:
Research and development	13,791	11,057
Sales and marketing	7,645	7,490
General and administrative	8,154	6,242
Restructuring costs	1,263
Total operating expenses	30,853	24,789
Loss from operations	(8,872)	(3,395)
Other income, net	23	409
Interest expense	(525)	(1,312)
Loss before income taxes	(9,374)	(4,298)
Income tax expense	(42)	(28)
Net loss	$ (9,416)	$ (4,326)
Net loss per share — basic and diluted	$ (0.40)	$ (0.19)
Weighted-average shares outstanding — basic and diluted	23,671	22,412