Minimum line covenant to be replaced by Fixed Charge Coverage Ratio covenant.

No definition available.

Name:	idsa_LineOfCreditFacilityCovenantComplianceReplacedByFixedChargeCoverageRatioCovenant
Namespace Prefix:	idsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of non-employee director.

+ References

No definition available.

+ Details

Name:	idsa_NumberOfNonEmployeeDirectors
Namespace Prefix:	idsa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash received for the settlement of litigation during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585

+ Details

Name:	us-gaap_ProceedsFromLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockUnitsRSUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=idsa_NonEmployeeBoardOfDirectorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=idsa_Midcap2016LoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Subsequent Events) (Details)				3 Months Ended	6 Months Ended
	Jul. 09, 2018 item shares	Mar. 28, 2018 shares	Mar. 29, 2016 shares	Jun. 30, 2018 USD ($)	Jun. 30, 2018 shares	Jul. 01, 2018 USD ($)
Subsequent Event [Line Items]
Proceeds from insurance related to claim settlements \| $				$ 744,900
Restricted Stock Units (RSUs) [Member]
Subsequent Event [Line Items]
Granted, Shares \| shares		18,000.0	11,400		58,600
Subsequent Event [Member] \| Restricted Stock Units (RSUs) [Member] \| Non-employee directors [Member]
Subsequent Event [Line Items]
Number of non-employee director grant share \| item	4
Granted, Shares \| shares	13,228
Subsequent Event [Member] \| MidCap 2016 Loan [Member] \| Line of Credit [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Covenant Compliance, Minimum Borrowing Capacity \| $						$ 350,000.0