The cash inflow associated with the collections of accounts receivable.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Definition

Represents the number of major customers of the entity on an annual basis.

+ References

No definition available.

+ Details

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Namespace Prefix:	issc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of major customers of the entity.

+ References

No definition available.

+ Details

Name:	issc_NumberOfMajorCustomers
Namespace Prefix:	issc_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Represents the number of major suppliers of the entity.

+ References

No definition available.

+ Details

Name:	issc_NumberOfMajorSuppliers
Namespace Prefix:	issc_
Data Type:	xbrli:integerItemType
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- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3-4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a(1)

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AllowanceForDoubtfulAccountsReceivable
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

+ Details

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- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3,4)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 4

-Article 5

+ Details

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Concentrations: (Details) (USD $)			0 Months Ended			12 Months Ended
Concentrations: (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Dec. 17, 2013 AAI	Sep. 30, 2013 AAI	Nov. 29, 2011 AAI	Sep. 30, 2013 Net sales Major Customers customer	Sep. 30, 2012 Net sales Major Customers customer	Sep. 30, 2011 Net sales Major Customers customer	Sep. 30, 2013 Net sales Major Customers Eclipse	Sep. 30, 2012 Net sales Major Customers Eclipse	Sep. 30, 2011 Net sales Major Customers Eclipse	Sep. 30, 2012 Net sales Major Customers FedEx	Sep. 30, 2011 Net sales Major Customers FedEx	Sep. 30, 2012 Net sales Major Customers National Nuclear Security Administration	Sep. 30, 2013 Net sales Major Customers AAI	Sep. 30, 2012 Net sales Major Customers AAI	Sep. 30, 2011 Net sales Major Customers AAI	Sep. 30, 2013 Net sales Major Customers Government contractors and agencies	Sep. 30, 2012 Net sales Major Customers Government contractors and agencies	Sep. 30, 2011 Net sales Major Customers Government contractors and agencies	Sep. 30, 2013 Net sales Major Products Air data systems and components	Sep. 30, 2012 Net sales Major Products Air data systems and components	Sep. 30, 2011 Net sales Major Products Air data systems and components	Sep. 30, 2013 Net sales Major Products FPDS	Sep. 30, 2012 Net sales Major Products FPDS	Sep. 30, 2011 Net sales Major Products FPDS	Sep. 30, 2013 Inventory purchases Major Suppliers supplier	Sep. 30, 2012 Inventory purchases Major Suppliers supplier
Concentrations
Number of major customers						5	5	5
Number of major annual customers						2	3	2
Concentrations risk (as a percent)						64.00%	63.00%	61.00%	24.00%	20.00%	20.00%	14.00%	15.00%	13.00%	14.00%	5.00%	8.00%	28.00%	45.00%	30.00%	12.00%	13.00%	21.00%	88.00%	87.00%	79.00%	30.00%	20.00%
Accounts receivable and unbilled receivables						$ 5,900,000	$ 2,400,000	$ 1,800,000
Accounts receivable	4,489,434	3,978,512		760,000	760,000
Collection of accounts receivable			760,000
Number of major suppliers																											1	1
Concentration of Credit Risk
Reserves for doubtful accounts	$ 0	$ 200,000