Income Taxes - Components of Income, Provision For and Reconciliation of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Income before provision for income taxes:
U.S.	$ 43,511	$ 26,054	$ 20,778
Foreign	10,764	7,568	6,019
Income before provision for income taxes	54,275	33,622	26,797
Currently payable:
Federal	7,072	4,039	4,252
Foreign	2,517	1,335	1,119
State	2,561	2,627	1,838
Total current expense	12,150	8,001	7,209
Deferred:
Federal	(92)	1,170	(869)
Foreign	230	309	331
State	308	(365)	(621)
Total deferred expense (benefit)	446	1,114	(1,159)
Total tax expense	$ 12,596	$ 9,115	$ 6,050
Reconciliation of tax rates with the federal statutory rate
Federal statutory rate (as a percent)	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit (as a percent)	5.30%	5.80%	5.50%
Tax law changes (as a percent)	0.40%	0.20%	0.00%
Share-based compensation (as a percent)	(5.00%)	(1.80%)	(5.00%)
Meals & Entertainment Expense	0.10%	0.20%	1.70%
Executive Compensation	1.30%	1.60%	1.60%
Uncertain tax positions (as a percent)	(0.30%)	(0.10%)	(2.50%)
Other (as a percent)	0.40%	0.20%	0.30%
Annual effective tax rate (as a percent)	23.20%	27.10%	22.60%