Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings
Beginning Balance (in shares) at Dec. 29, 2018		12,550,711
Beginning Balance at Dec. 29, 2018	$ 317,542	$ 126	$ 236,525	$ 80,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	4,167		4,167
Restricted stock issuance, net (in shares)		60,124
Restricted stock issuance, net	0	$ 1	(1)
Stock issuance for acquisitions (in shares)		35,821
Stock issuance for acquisitions	2,230		2,230
Proceeds from secondary offering, net of costs (in shares)		11,185
Payment of contingent consideration with common stock	725		725
Net income	14,337			14,337
Ending Balance (in shares) at Jun. 29, 2019		12,657,841
Ending Balance at Jun. 29, 2019	339,001	$ 127	243,646	95,228
Beginning Balance (in shares) at Mar. 30, 2019		12,565,115
Beginning Balance at Mar. 30, 2019	326,171	$ 126	239,611	86,434
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	2,369		2,369
Restricted stock issuance, net (in shares)		66,874
Restricted stock issuance, net	0	$ 1	(1)
Stock issuance for acquisitions (in shares)		25,852
Stock issuance for acquisitions	1,667		1,667
Payment of contingent consideration with common stock	0
Net income	8,794			8,794
Ending Balance (in shares) at Jun. 29, 2019		12,657,841
Ending Balance at Jun. 29, 2019	339,001	$ 127	243,646	95,228
Beginning Balance (in shares) at Dec. 28, 2019		12,852,357
Beginning Balance at Dec. 28, 2019	355,963	$ 129	251,187	104,647
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	6,880		6,880
Restricted stock issuance, net (in shares)		163,835
Restricted stock issuance, net	0	$ 1	(1)
Stock issuance for acquisitions (in shares)		12,406
Stock issuance for acquisitions	558		558
Proceeds from secondary offering, net of costs (in shares)		5,244
Payment of contingent consideration with common stock	278		278
Net income	8,691			8,691
Ending Balance (in shares) at Jun. 27, 2020		13,033,842
Ending Balance at Jun. 27, 2020	372,370	$ 130	258,902	113,338
Beginning Balance (in shares) at Mar. 28, 2020		12,874,424
Beginning Balance at Mar. 28, 2020	364,366	$ 129	255,402	108,835
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	3,501		3,501
Restricted stock issuance, net (in shares)		159,418
Restricted stock issuance, net	0	$ 1	(1)
Stock issuance for acquisitions	0
Payment of contingent consideration with common stock	0
Net income	4,503			4,503
Ending Balance (in shares) at Jun. 27, 2020		13,033,842
Ending Balance at Jun. 27, 2020	$ 372,370	$ 130	$ 258,902	$ 113,338