XML 98 R81.htm IDEA: XBRL DOCUMENT
v3.20.4

Goodwill Reported By segment (Detail) - USD ($) $ in Thousands | Jan. 01, 2021 | Jan. 03, 2020
--- | --- | ---
Goodwill Reported By Segment [Line Items] |  |
Goodwill | $ 8,607 | $ 8,607
Environmental and Health |  |
Goodwill Reported By Segment [Line Items] |  |
Goodwill | 8,099 | 8,099
Engineering and Other Scientific |  |
Goodwill Reported By Segment [Line Items] |  |
Goodwill | $ 508 | $ 508

X
- Definition Goodwill Reported By Segment [Line Items] + References No definition available. + Details
Name: | expo_GoodwillreportedbysegmentLineItems
Namespace Prefix: | expo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=expo_EnvironmentalAndHealthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=expo_EngineeringAndOtherScientificMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |