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Income Taxes - Components of Income, Provision For and Reconciliation of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Income before provision for income taxes:
U.S.	$ 26,054	$ 20,778	$ 21,118
Foreign	7,568	6,019	7,815
Income before provision for income taxes	33,622	26,797	28,933
Currently payable:
Federal	4,039	4,252	4,015
Foreign	1,335	1,119	1,487
State	2,627	1,838	1,788
Total current expense	8,001	7,209	7,290
Deferred:
Federal	1,170	(869)	(384)
Foreign	309	331	(88)
State	(365)	(621)	(357)
Total deferred expense (benefit)	1,114	(1,159)	(829)
Total tax expense	$ 9,115	$ 6,050	$ 6,461
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)	5.80%	5.50%	4.90%
Tax law changes (as a percent)	0.20%	0.00%	0.90%
Share-based compensation (as a percent)	(1.80%)	(5.00%)	(6.30%)
Meals & Entertainment Expense	0.20%	1.70%	1.30%
Executive Compensation	1.60%	1.60%	1.00%
Uncertain tax positions (as a percent)	(0.10%)	(2.50%)	(1.10%)
Other (as a percent)	0.20%	0.30%	0.60%
Annual effective tax rate (as a percent)	27.10%	22.60%	22.30%

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- References

No definition available.

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 20
-Section 45
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324

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- Definition

The increase (decrease) during the reporting period in the account that represents the temporary difference that results from Income or Loss that is recognized for accounting purposes but not for tax purposes and vice versa.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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