CONDENSED CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect Period of Adoption, Adjustment	Cumulative Effect Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect Period of Adoption, Adjustment	Retained Earnings Cumulative Effect Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect Period of Adoption, Adjusted Balance
Beginning balance at Dec. 28, 2019	$ 197,751		$ 197,548	$ 9,265	$ 9,265	$ 200,249		$ 200,046	$ (11,763)	$ (11,763)
Beginning balance (ASC 326) at Dec. 28, 2019		$ (203)					$ (203)
Beginning balance (in shares) at Dec. 28, 2019				7,814,797	7,814,797
Increase (Decrease) in Shareholders' Equity
Net income	6,468					6,468
Foreign currency translation adjustment	(2,427)								(2,427)
Issuance of restricted common stock for contingent consideration	0
Exercise of stock options	151			$ 151
Exercise of stock options (in shares)				8,200
Share-based compensation expense	$ 655			$ 655
Restricted shares vesting (in shares)	23,884
Redemption of vested employee restricted shares for tax withholding	$ (390)			$ (390)
Redemption of vested employee restricted shares for tax withholding (in shares)				(7,843)
Shares repurchased	(3,810)			$ (3,810)
Shares repurchased (in shares)				(82,613)
Accrued dividends on unvested shares	1					1
Cash paid on dividend equivalents	(40)					(40)
Cash dividends paid to shareholders (per share)	(1,796)					(1,796)
Ending balance at Mar. 28, 2020	196,360			$ 5,871		204,679			(14,190)
Ending balance (in shares) at Mar. 28, 2020				7,756,425
Beginning balance at Jan. 02, 2021	$ 209,019			$ 503		216,999			(8,483)
Beginning balance (in shares) at Jan. 02, 2021	7,693,497			7,693,497
Increase (Decrease) in Shareholders' Equity
Net income	$ 10,501					10,501
Foreign currency translation adjustment	(111)								(111)
Issuance of restricted common stock for contingent consideration	$ 2,250
Issuance of restricted common stock for contingent consideration (in shares)	40,039
Exercise of stock options	$ 1,113			$ 1,113
Exercise of stock options (in shares)				41,008
Share-based compensation expense	842			$ 842
Restricted shares vesting (in shares)				29,494
Redemption of vested employee restricted shares for tax withholding	(588)			$ (588)
Redemption of vested employee restricted shares for tax withholding (in shares)				(9,895)
Shares repurchased	(9,642)			$ (4,120)		(5,522)
Shares repurchased (in shares)				(166,552)
Accrued dividends on unvested shares	5					5
Cash paid on dividend equivalents	(79)					(79)
Cash dividends paid to shareholders (per share)	(1,982)					(1,982)
Ending balance at Apr. 03, 2021	$ 211,328			$ 0		$ 219,922			$ (8,594)
Ending balance (in shares) at Apr. 03, 2021	7,627,591			7,627,591