XML 49 R36.htm IDEA: XBRL DOCUMENT v3.10.0.1

Concentrations (Details) $ in Millions	12 Months Ended
	Sep. 30, 2018 USD ($) customer item	Sep. 30, 2017 USD ($) customer item	Sep. 30, 2016 USD ($) customer	Sep. 30, 2014 USD ($)
Concentration of Credit Risk
Number of banks for maintenance of cash balances | item	2
Customer one
Concentrations
Number of customers	1
Net sales | Major Customers and Products
Concentrations
Concentration of risk (as a percent)	48.00%	54.00%	51.00%
Number of major customers	5	5	5
Number of major annual customers		3	3
Accounts receivable and unbilled receivables | $	$ 1.4	$ 1.3	$ 1.6
Net sales | Major Customers and Products | Sierra Nevada
Concentrations
Concentration of risk (as a percent)		16.00%	13.00%
Net sales | Major Customers and Products | Pilatus
Concentrations
Concentration of risk (as a percent)	20.00%	12.00%
Net sales | Major Customers and Products | Jet2
Concentrations
Concentration of risk (as a percent)			12.00%
Net sales | Major Customers and Products | DHL
Concentrations
Concentration of risk (as a percent)		10.00%	11.00%
Net sales | Major Customers and Products | Government contractors and Agencies
Concentrations
Concentration of risk (as a percent)	32.00%	53.00%	32.00%
Net sales | Major Products | FPDS
Concentrations
Concentration of risk (as a percent)	75.00%	89.00%	95.00%
Net sales | Major Products | Air data systems and components
Concentrations
Concentration of risk (as a percent)	25.00%	11.00%	5.00%
Accounts receivable | Major Customers and Products | Customer one
Concentrations
Concentration of risk (as a percent)	27.00%
Inventory | Major Suppliers
Concentrations
Concentration of risk (as a percent)	11.00%	33.00%
Number of major suppliers | item	1	3
Delta
Concentration of Credit Risk
Provision for loss on unbilled receivables | $				$ 3.7

X

- References

No definition available.

+ Details

Name:	issc_ConcentrationOfCreditRiskAbstract
Namespace Prefix:	issc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of banks for maintenance of cash balances.

+ References

No definition available.

+ Details

Name:	issc_NumberOfBanks
Namespace Prefix:	issc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of customers accounted for 27% of accounts receivable.

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- 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
Period Type:	duration

X

- 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
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of provision related to unbilled receivables not expected to be collected.

+ References

No definition available.

+ Details

Name:	issc_ProvisionForLossOnUnbilledReceivables
Namespace Prefix:	issc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- 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 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: 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=77997519&loc=d3e13531-108611

Reference 3: 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=84177426&loc=d3e6404-108592

Reference 4: 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=77997519&loc=d3e13537-108611

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section S99
-Paragraph 3
-Subparagraph (SX 210.6-06(3))
-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604059-122996

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(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(5))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_ReceivablesNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_MajorCustomersAxis=issc_CustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=issc_RevenuesNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=issc_SierraNevadaCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=issc_PilatusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=issc_Jet2.comLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=issc_DhlAviationServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_MajorCustomersAxis=issc_GovernmentContractorsAndAgenciesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_ProductConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=issc_FlatPanelDisplaySystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ProductOrServiceAxis=issc_AirDataSystemsAndComponentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=issc_InventoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_SupplierConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CounterpartyNameAxis=issc_DeltaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: