Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings
Balance (in shares) at Dec. 31, 2016		10,566,528
Balance at Dec. 31, 2016	$ 148,161	$ 106	$ 118,026	$ 30,029
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	4,011		4,011
Restricted stock issuance, net (in shares)		176,198
Restricted stock issuance, net	0	$ 2	(2)
Stock issuance for acquisitions (in shares)		90,324
Stock issuance for acquisitions	3,856	$ 0	3,856
Payment of contingent consideration with common stock (in shares)		1,720
Payment of contingent consideration with common stock	63	$ 0	63
Net income	24,006	$ 0	0	24,006
Balance (in shares) at Dec. 30, 2017		10,834,770
Balance at Dec. 30, 2017	180,097	$ 108	125,954	54,035
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	6,697		6,697
Restricted stock issuance, net (in shares)		172,820
Restricted stock issuance, net	0	$ 2	(2)
Stock issuance for acquisitions (in shares)		133,121
Stock issuance for acquisitions	9,330	$ 1	9,329
Proceeds from secondary offering, net of costs (in shares)		1,270,000
Proceeds from secondary offering, net of costs	93,469	$ 13	93,456
Proceeds from exercise of warrants, net of costs (in shares)		140,000
Proceeds from exercise of warrants, net of costs	1,093	$ 2	1,091	0
Net income	26,856	$ 0	0	26,856
Balance (in shares) at Dec. 29, 2018		12,550,711
Balance at Dec. 29, 2018	317,542	$ 126	236,525	80,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	10,430		10,430
Restricted stock issuance, net (in shares)		234,805
Restricted stock issuance, net	0	$ 2	(2)
Stock issuance for acquisitions (in shares)		55,656
Stock issuance for acquisitions	3,511	$ 1	3,510
Payment of contingent consideration with common stock (in shares)		11,185
Payment of contingent consideration with common stock	724	$ 0	724
Net income	23,756	$ 0	0	23,756
Balance (in shares) at Dec. 28, 2019		12,852,357
Balance at Dec. 28, 2019	$ 355,963	$ 129	$ 251,187	$ 104,647