Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [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	$ 0	$ (433,290)	$ (2,603)	$ 327,659
Net income	0	0	0	18,796	0	18,796
Other comprehensive loss	0	0	0	0	40	40
Total comprehensive income (loss)						18,836
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	1,264,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 12	(2,117)	0	0	0	(2,105)
Stock-based compensation expense	$ 0	19,740	0	0	0	19,740
Balances (in shares) at Jun. 27, 2020	135,147,000
Balances at Jun. 27, 2020	$ 1,351	779,836	0	(414,494)	(2,563)	364,130
Balances (in shares) at Mar. 28, 2020	134,513,000
Balances at Mar. 28, 2020	$ 1,345	769,451	0	(425,123)	(2,714)	342,959
Net income	0	0	0	10,629	0	10,629
Other comprehensive loss	0	0	0	0	151	151
Total comprehensive income (loss)						10,780
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	634,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 6	(627)	0	0	0	(621)
Stock-based compensation expense	$ 0	11,012	0	0	0	11,012
Balances (in shares) at Jun. 27, 2020	135,147,000
Balances at Jun. 27, 2020	$ 1,351	779,836	0	(414,494)	(2,563)	$ 364,130
Balances (in shares) at Jan. 02, 2021	136,236,000					136,236,000
Balances at Jan. 02, 2021	$ 1,362	770,711	0	(385,898)	(1,748)	$ 384,427
Net income	0	0	0	40,651	0	40,651
Other comprehensive loss	0	0	0	0	(49)	(49)
Total comprehensive income (loss)						40,602
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	937,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 9	(9,984)	0	0	0	(9,975)
Stock-based compensation expense	0	22,374	0	0	0	22,374
Purchases of treasury stock	$ 0	0	(40,113)	0	0	(40,113)
Retirement of treasury stock (in shares)	(829,000)
Retirement of treasury stock	$ (8)	(40,105)	40,113	0	0	$ 0
Balances (in shares) at Jul. 03, 2021	136,344,000					136,344,000
Balances at Jul. 03, 2021	$ 1,363	742,996	0	(345,247)	(1,797)	$ 397,315
Balances (in shares) at Apr. 03, 2021	136,401,000
Balances at Apr. 03, 2021	$ 1,364	759,291	0	(367,085)	(1,985)	391,585
Net income	0	0	0	21,838	0	21,838
Other comprehensive loss	0	0	0	0	188	188
Total comprehensive income (loss)						22,026
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes (in shares)	465,000
Common stock issued in connection with employee equity incentive plans, net of shares withheld for employee taxes	$ 4	(3,109)	0	0	0	(3,105)
Stock-based compensation expense	0	11,920	0	0	0	11,920
Purchases of treasury stock	$ 0	0	(25,111)	0	0	(25,111)
Retirement of treasury stock (in shares)	(522,000)
Retirement of treasury stock	$ (5)	(25,106)	25,111	0	0	$ 0
Balances (in shares) at Jul. 03, 2021	136,344,000					136,344,000
Balances at Jul. 03, 2021	$ 1,363	$ 742,996	$ 0	$ (345,247)	$ (1,797)	$ 397,315