Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings (Accumulated Deficit) [Member]
Balance at Dec. 31, 2018	$ 361,888	$ 31	$ 369,893	$ (1,263)	$ (6,773)
Balance, Shares at Dec. 31, 2018		24,855
Issuance of shares through share-based compensation plans, net, Shares		83
Repurchase of common stock	(744)		(744)
Repurchase of common stock, Shares		(30)
Net (loss) income	7,576				7,576
Share-based compensation	2,163		2,163
Share-based compensation plan withholdings	(598)		(598)
Share-based compensation plan withholdings, Shares		(22)
Currency translation	(518)			(518)
Unrealized gain (loss) on investments	95			95
Balance at Mar. 31, 2019	369,862	$ 31	370,714	(1,686)	803
Balance, shares at Mar. 31, 2019		24,886
Balance at Dec. 31, 2019	1,264,026	$ 50	1,269,437	(598)	(4,863)
Balance, Shares at Dec. 31, 2019		50,184
Issuance of shares through share-based compensation plans, net	164		164
Issuance of shares through share-based compensation plans, net, Shares		240
Repurchase of common stock	(33,614)	$ (1)	(33,613)
Repurchase of common stock, Shares		(1,250)
Net (loss) income	(4,404)				(4,404)
Share-based compensation	3,955		3,955
Share-based compensation plan withholdings	(1,565)		(1,565)
Share-based compensation plan withholdings, Shares		(42)
Currency translation	(2,231)			(2,231)
Unrealized gain (loss) on investments	(526)			(526)
Balance at Mar. 28, 2020	$ 1,225,805	$ 49	$ 1,238,378	$ (3,355)	$ (9,267)
Balance, shares at Mar. 28, 2020		49,132