For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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-Subparagraph (a)
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Industry and Client Credit Risk - Additional Information (Detail) - Customer Concentration Risk [Member] - Client	12 Months Ended
	Jan. 01, 2021	Jan. 03, 2020	Dec. 28, 2018
Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage			12.00%
Number of clients comprised more than 10% of revenue or accounts receivable	0	0	1
Accounts Receivable [Member]
Concentration Risk [Line Items]
Number of clients comprised more than 10% of revenue or accounts receivable	0	0
Consumer Products [Member] \| Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	24.00%
Energy and Utilities [Member] \| Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	16.00%
Transportation Industry [Member] \| Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	14.00%
Chemical Industry [Member] \| Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	13.00%