CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - 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 Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 29, 2018				8,010,480
Beginning balance at Dec. 29, 2018	$ 196,472			$ 22,837		$ 186,229			$ (12,594)
Increase (Decrease) in Shareholders' Equity
Net income	20,747					20,747
Foreign currency translation adjustment	831								831
Issuance of restricted common stock for contingent consideration	0
Exercise of stock options (in shares)				140,513
Exercise of stock options	3,211			$ 3,211
Share-based compensation expense	3,461			$ 3,461
Restricted shares vesting (in shares)				128,089
Redemption of vested employee restricted shares for tax withholding (in shares)				(43,173)
Redemption of vested employee restricted shares for tax withholding	(2,176)			$ (2,176)
Shares repurchased (in shares)				(421,112)
Shares repurchased	(18,068)			$ (18,068)
Accrued dividends on unvested shares	58					58
Cash dividends paid to shareholders	(6,785)					(6,785)
Ending balance (in shares) at Dec. 28, 2019				7,814,797	7,814,797
Ending balance at Dec. 28, 2019	$ 197,751	$ (203)	$ 197,548	$ 9,265	$ 9,265	200,249	$ (203)	$ 200,046	(11,763)	$ (11,763)
Increase (Decrease) in Shareholders' Equity
Accounting Standards Update [Extensible Enumeration]	ASC 326
Net income	$ 24,507					24,507
Foreign currency translation adjustment	3,280								3,280
Issuance of restricted common stock for contingent consideration	0
Exercise of stock options (in shares)				118,841
Exercise of stock options	2,236			$ 2,236
Share-based compensation expense	3,235			$ 3,235
Restricted shares vesting (in shares)				61,396
Redemption of vested employee restricted shares for tax withholding (in shares)				(17,695)
Redemption of vested employee restricted shares for tax withholding	(862)			$ (862)
Shares repurchased (in shares)				(283,842)
Shares repurchased	(13,371)			$ (13,371)
Accrued dividends on unvested shares	(51)					(51)
Cash dividends paid to shareholders	$ (7,503)					(7,503)
Ending balance (in shares) at Jan. 02, 2021	7,693,497			7,693,497
Ending balance at Jan. 02, 2021	$ 209,019			$ 503		216,999			(8,483)
Increase (Decrease) in Shareholders' Equity
Net income	41,679					41,679
Foreign currency translation adjustment	(1,467)								(1,467)
Issuance of restricted common stock for contingent consideration (in shares)				40,039
Issuance of restricted common stock for contingent consideration	2,250			$ 2,250
Exercise of stock options (in shares)				192,803
Exercise of stock options	5,157			$ 5,157
Share-based compensation expense	4,086			$ 4,086
Restricted shares vesting (in shares)				65,242
Redemption of vested employee restricted shares for tax withholding (in shares)				(20,133)
Redemption of vested employee restricted shares for tax withholding	(1,528)			$ (1,528)
Shares repurchased (in shares)				(608,745)
Shares repurchased	(44,976)			$ (10,468)		(34,508)
Accrued dividends on unvested shares	(97)					(97)
Cash dividends paid to shareholders	$ (8,289)					(8,289)
Ending balance (in shares) at Jan. 01, 2022	7,362,703			7,362,703
Ending balance at Jan. 01, 2022	$ 205,834			$ 0		$ 215,784			$ (9,950)