Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net revenue	$ 81,031	$ 47,480
Cost of revenue	52,936	31,485
Gross profit	28,095	15,995
Operating expenses:
Research and product development	11,119	9,710
Selling, marketing, general and administrative	31,824	13,507
Restructuring and other charges	6,252
Impairment of long-lived assets	1,735
Amortization of intangible assets	262	372
Total operating expenses	51,192	23,589
Operating income (loss)	(23,097)	(7,594)
Interest income	42	70
Interest expense	(249)	(643)
Loss on extinguishment of debt		(1,369)
Other income (expense), net	972	760
Income (loss) before income taxes	(22,332)	(8,776)
Income tax provision (benefit)	893	(5)
Net income (loss)	(23,225)	(8,771)
Foreign currency translation adjustments	(2,270)	(3,435)
Actuarial gain (loss)	(28)	1,456
Comprehensive income (loss)	$ (25,523)	$ (10,750)
Net income (loss) per share
Basic	$ (0.92)	$ (0.41)
Diluted	$ (0.92)	$ (0.41)
Weighted average shares outstanding used to compute basic net income (loss) per share	25,252	21,474
Weighted average shares outstanding used to compute diluted net income (loss) per share	25,252	21,474