Condensed Consolidated Statements of Stockholders' Equity and Redeemable Non-controlling Interest - USD ($) $ in Thousands	Total	Common Stock	Treasury	Additional paid-in capital	Accumulated other comprehensive (loss) income	Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standard, net of taxes	$ (228)					$ (228)
Beginning Balance (in shares) at Dec. 28, 2018		38,881,000	890,000
Beginning Balance at Dec. 28, 2018	321,205	$ 38	$ (13,754)	$ 116,019	$ (784)	219,686
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans, net of shares repurchased for income tax withholding (in shares)		180,000
Issuance of common stock under equity compensation plans, net of shares repurchased for income tax withholding	(1,229)			(1,229)
Stock-based compensation expense	1,729			1,729
Foreign currency translation adjustment	(159)				(159)
Net income	18,103					18,103
Ending Balance (in shares) at Mar. 29, 2019		39,061,000	890,000
Ending Balance at Mar. 29, 2019	339,421	$ 38	$ (13,754)	116,519	(943)	237,561
Beginning Balance at Dec. 28, 2018	14,282
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income	299
Ending Balance at Mar. 29, 2019	$ 14,581
Beginning Balance (in shares) at Jan. 03, 2020	38,559	39,448,000	890,000
Beginning Balance at Jan. 03, 2020	$ 422,200	$ 39	$ (13,754)	123,274	150	312,491
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under equity compensation plans, net of shares repurchased for income tax withholding (in shares)		45,000
Issuance of common stock under equity compensation plans, net of shares repurchased for income tax withholding	(2,047)			(2,047)
Stock-based compensation expense	1,921			1,921
Foreign currency translation adjustment	(940)				(940)
Net income	$ 8,250					8,250
Ending Balance (in shares) at Apr. 03, 2020	38,603	39,493,000	890,000
Ending Balance at Apr. 03, 2020	$ 429,706	$ 39	$ (13,754)	$ 123,470	$ (790)	$ 320,741
Beginning Balance at Jan. 03, 2020	15,719
Increase (Decrease) in Temporary Equity [Roll Forward]
Temporary Equity, Net Income	488
Ending Balance at Apr. 03, 2020	$ 16,207