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v2.4.1.9

Commitments and Contingencies: (Details) (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Operating Leases |  |  |
Rent expense under operating leases | $ 69,000 us-gaap_OperatingLeasesRentExpenseNet | $ 39,000 us-gaap_OperatingLeasesRentExpenseNet | $ 30,000 us-gaap_OperatingLeasesRentExpenseNet
Purchase obligations |  |  |
Purchase obligations on open purchase orders | 2,100,000 us-gaap_PurchaseObligation | 3,800,000 us-gaap_PurchaseObligation | 1,900,000 us-gaap_PurchaseObligation
Product Liability |  |  |
Product liability insurance | $ 50,000,000 issc_ProductLiabilityInsurance |  |

X
- Details
Name: | issc_ProductLiabilityAbstract
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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Represents amount of insurance which is adequate to cover potential liabilities that may arise from product liability claims. + References No definition available. + Details
Name: | issc_ProductLiabilityInsurance
Namespace Prefix: | issc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_LeasesOperatingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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Period Type: | duration

X
- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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