Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 28, 2019	133,883,000
Balances at Dec. 28, 2019	$ 1,339	$ 762,213	$ (433,290)	$ (2,603)	$ 327,659
Net income	0	0	31,403	0	31,403
Other comprehensive loss	0	0	0	392	392
Total comprehensive income (loss)					31,795
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	2,195,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 22	(12,811)	0	0	(12,789)
Stock-based compensation expense	$ 0	30,228	0	0	30,228
Balances (in shares) at Sep. 26, 2020	136,078,000
Balances at Sep. 26, 2020	$ 1,361	779,630	(401,887)	(2,211)	376,893
Balances (in shares) at Jun. 27, 2020	135,147,000
Balances at Jun. 27, 2020	$ 1,351	779,836	(414,494)	(2,563)	364,130
Net income	0	0	12,607	0	12,607
Other comprehensive loss	0	0	0	352	352
Total comprehensive income (loss)					12,959
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	931,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 10	(10,694)	0	0	(10,684)
Stock-based compensation expense	$ 0	10,488	0	0	10,488
Balances (in shares) at Sep. 26, 2020	136,078,000
Balances at Sep. 26, 2020	$ 1,361	779,630	(401,887)	(2,211)	$ 376,893
Balances (in shares) at Jan. 02, 2021	136,236,000				136,236,000
Balances at Jan. 02, 2021	$ 1,362	770,711	(385,898)	(1,748)	$ 384,427
Net income	0	0	67,390	0	67,390
Other comprehensive loss	0	0	0	(68)	(68)
Total comprehensive income (loss)					67,322
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	1,746,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 18	(36,365)	0	0	(36,347)
Stock-based compensation expense	$ 0	32,624	0	0	32,624
Repurchase of common stock (in shares)	(1,081,000)
Repurchase of common stock	$ (11)	(55,115)	0	0	$ (55,126)
Balances (in shares) at Oct. 02, 2021	136,901,000				136,901,000
Balances at Oct. 02, 2021	$ 1,369	711,855	(318,508)	(1,816)	$ 392,900
Balances (in shares) at Jul. 03, 2021	136,344,000
Balances at Jul. 03, 2021	$ 1,363	742,996	(345,247)	(1,797)	397,315
Net income	0	0	26,739	0	26,739
Other comprehensive loss	0	0	0	(19)	(19)
Total comprehensive income (loss)					26,720
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	809,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 9	(26,381)	0	0	(26,372)
Stock-based compensation expense	$ 0	10,250	0	0	10,250
Repurchase of common stock (in shares)	(252,000)
Repurchase of common stock	$ (3)	(15,010)	0	0	$ (15,013)
Balances (in shares) at Oct. 02, 2021	136,901,000				136,901,000
Balances at Oct. 02, 2021	$ 1,369	$ 711,855	$ (318,508)	$ (1,816)	$ 392,900