CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balances (in shares) at Dec. 29, 2018		74,139,712
Beginning balances at Dec. 29, 2018	$ 580,164	$ 74	$ 862,897	$ 780	$ (283,587)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		544,271
Issuance of common stock under the Employee Stock Purchase Plan	6,807	$ 1	6,806
Issuance of common stock pursuant to exercise of options for cash (in shares)		162,956
Issuance of common stock pursuant to exercise of options for cash	1,176		1,176
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		918,051
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld for tax	(8,025)	$ 1	(8,026)
Stock-based compensation	22,968		22,968
Other comprehensive income (loss)	(1,439)			(1,439)
Net income	39,346				39,346
Ending balances (in shares) at Dec. 28, 2019		75,764,990
Ending balances at Dec. 28, 2019	640,997	$ 76	885,821	(659)	(244,241)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		485,566
Issuance of common stock under the Employee Stock Purchase Plan	7,875	$ 0	7,875
Issuance of common stock pursuant to exercise of options for cash (in shares)		255,769
Issuance of common stock pursuant to exercise of options for cash	2,135	$ 1	2,134
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		931,672
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld for tax	(15,450)	$ 1	(15,451)
Stock-based compensation	23,459		23,459
Other comprehensive income (loss)	6,545			6,545
Net income	$ 78,523				78,523
Ending balances (in shares) at Dec. 26, 2020	77,437,997	77,437,997
Ending balances at Dec. 26, 2020	$ 744,084	$ 78	903,838	5,886	(165,718)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)		378,584
Issuance of common stock under the Employee Stock Purchase Plan	9,809		9,809
Issuance of common stock pursuant to exercise of options for cash (in shares)		100,000
Issuance of common stock pursuant to exercise of options for cash	844	$ 0	844
Issuance of common stock pursuant to vesting of restricted stock units (in shares)		946,325
Issuance of common stock pursuant to vesting of restricted stock units, net of stock withheld for tax	(20,603)	$ 1	(20,604)
Stock repurchased during the period (in shares)		622,400
Purchase and retirement of common stock	(24,038)	$ (1)	(24,037)
Stock-based compensation	29,095		29,095
Other comprehensive income (loss)	(7,335)			(7,335)
Net income	$ 83,924				83,924
Ending balances (in shares) at Dec. 25, 2021	78,240,506	78,240,506
Ending balances at Dec. 25, 2021	$ 815,780	$ 78	$ 898,945	$ (1,449)	$ (81,794)