XML 56 R41.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Business (Details) | Sep. 30, 2017 numberoffacilities
--- | ---
Communications [Member] |
Business Transactions [Line Items] |
Number Of Locations | 12
Residential [Member] |
Business Transactions [Line Items] |
Number Of Locations | 36
Commercial & Industrial [Member] |
Business Transactions [Line Items] |
Number Of Locations | 24
Infrastructure Solutions [Member] |
Business Transactions [Line Items] |
Number Of Locations | 10

X
- References No definition available. + Details
Name: | iesc_BusinessTransactionsLineItems
Namespace Prefix: | iesc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of locations within the United States. + References No definition available. + Details
Name: | iesc_NumberOfLocations
Namespace Prefix: | iesc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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

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

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