Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net revenue	$ 88,412	$ 93,947	$ 252,143	$ 211,959
Cost of revenue	56,213	65,755	164,771	144,004
Gross profit	32,199	28,192	87,372	67,955
Operating expenses:
Research and product development	11,707	9,033	34,788	27,238
Selling, marketing, general and administrative	19,539	16,795	69,619	43,472
Restructuring and other charges	6,754		12,098
Impairment of long-lived assets			1,735
Amortization of intangible assets	312	387	888	1,130
Total operating expenses	38,312	26,215	119,128	71,840
Operating income (loss)	(6,113)	1,977	(31,756)	(3,885)
Interest income	20	14	81	98
Interest expense	(49)	(446)	(326)	(1,503)
Loss on extinguishment of debt				(1,369)
Other income (expense), net	922	(41)	1,633	69
Income (loss) before income taxes	(5,220)	1,504	(30,368)	(6,590)
Income tax provision (benefit)	676	1,619	2,032	2,452
Net income (loss)	(5,896)	(115)	(32,400)	(9,042)
Foreign currency translation adjustments	(2,036)	1,112	(4,090)	(1,519)
Actuarial gain (loss)			55	285
Comprehensive income (loss)	$ (7,932)	$ 997	$ (36,435)	$ (10,276)
Net income (loss) per share
Basic	$ (0.22)	$ (0.01)	$ (1.22)	$ (0.42)
Diluted	$ (0.22)	$ (0.01)	$ (1.22)	$ (0.42)
Weighted average shares outstanding used to compute basic net income (loss) per share	27,201	21,592	26,484	21,532
Weighted average shares outstanding used to compute diluted net income (loss) per share	27,201	21,592	26,484	21,532