CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Shares	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2018	$ 368,255	$ 423,856	$ 46,018	$ (79,092)	$ (22,527)
Balance (in shares) at Dec. 31, 2018		34,886
Consolidated net income	12,253			12,253
Common shares issued under stock plans (in shares)		186
Common shares withheld for taxes on vested stock awards	(5,890)		(5,890)
Common shares withheld for taxes on vested stock awards (in shares)		(74)
Share-based compensation	2,727		2,727
Other comprehensive income (loss), net of tax	2,356				2,356
Balance at Mar. 29, 2019	379,701	$ 423,856	42,855	(66,839)	(20,171)
Balance (in shares) at Mar. 29, 2019		34,998
Balance at Dec. 31, 2019	417,172	$ 423,856	49,748	(38,319)	(18,113)
Balance (in shares) at Dec. 31, 2019		35,052
Consolidated net income	11,947			11,947
Common shares issued under stock plans	179		179
Common shares issued under stock plans (in shares)		222
Common shares withheld for taxes on vested stock awards	(7,825)		(7,825)
Common shares withheld for taxes on vested stock awards (in shares)		(87)
Repurchases of common shares	(5,500)		(5,500)
Repurchases of common shares (in shares)		(65)
Share-based compensation	3,199		3,199
Other comprehensive income (loss), net of tax	(6,069)				(6,069)
Balance at Apr. 03, 2020	$ 413,103	$ 423,856	$ 39,801	$ (26,372)	$ (24,182)
Balance (in shares) at Apr. 03, 2020		35,122