Condensed Consolidated Statements of Shareholders' (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 28, 2019		27,961
Beginning balance at Dec. 28, 2019	$ (159,431)	$ 280	$ 0	$ (159,711)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	39,140			39,140
Exercise of common stock options (in shares)		167
Exercise of common stock options	3,283	$ 1	3,282
Stock-based compensation (in shares)		396
Stock-based compensation	2,051	$ 4	2,047
Repurchases of common stock (in shares)		(888)
Repurchases of common stock	(40,952)	$ (9)	(5,329)	(35,614)
Ending balance (in shares) at Mar. 28, 2020		27,636
Ending balance at Mar. 28, 2020	$ (155,909)	$ 276	0	(156,185)
Beginning balance (in shares) at Jan. 02, 2021	25,390	25,390
Beginning balance at Jan. 02, 2021	$ (223,978)	$ 254	0	(224,232)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	66,634			66,634
Exercise of common stock options (in shares)		106
Exercise of common stock options	2,460	$ 1	2,459
Stock-based compensation (in shares)		314
Stock-based compensation	6,416	$ 3	6,413
Repurchases of common stock (in shares)		(1,346)
Repurchases of common stock	$ (184,182)	$ (13)	(8,872)	(175,297)
Ending balance (in shares) at Apr. 03, 2021	24,464	24,464
Ending balance at Apr. 03, 2021	$ (332,650)	$ 245	$ 0	$ (332,895)