XML 31 R23.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Shareholders' Equity and Share-based Payments (Details) (USD $) | 3 Months Ended | 6 Months Ended | 77 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2015 item | Mar. 31, 2014 | Mar. 31, 2015 | Sep. 30, 2014 | Apr. 17, 2014 | Oct. 01, 2014 | Jan. 01, 2015
Shareholders' Equity and Share-based Payments |  |  |  |  |  |  |  |  |
Common stock, shares authorized | 75,000,000 us-gaap_CommonStockSharesAuthorized |  | 75,000,000 us-gaap_CommonStockSharesAuthorized |  | 75,000,000 us-gaap_CommonStockSharesAuthorized | 75,000,000 us-gaap_CommonStockSharesAuthorized |  |  |
Preferred Stock, shares authorized | 10,000,000 us-gaap_PreferredStockSharesAuthorized |  | 10,000,000 us-gaap_PreferredStockSharesAuthorized |  | 10,000,000 us-gaap_PreferredStockSharesAuthorized | 10,000,000 us-gaap_PreferredStockSharesAuthorized |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ 146,000 us-gaap_AllocatedShareBasedCompensationExpense | $ 205,000 us-gaap_AllocatedShareBasedCompensationExpense | $ 350,000 us-gaap_AllocatedShareBasedCompensationExpense | $ 440,000 us-gaap_AllocatedShareBasedCompensationExpense |  |  |  |  |
Income tax effect recognized as a charge to additional paid-in capital related to share-based compensation | (5,000)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet | (13,000)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet | (47,000)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet | (159,000)us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet |  |  |  |  |
Number of share-based compensation plans maintained by the company |  |  | 3 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans |  |  |  |  |  |
Stock repurchase program |  |  |  |  |  |  |  |  |
Maximum number of shares of outstanding common stock approved to acquire under repurchase program |  |  |  |  |  |  | 250,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased |  |
Number of shares of common stock purchased under the repurchase program |  |  | 89,644 us-gaap_TreasuryStockSharesAcquired |  |  |  |  |  |
Cost of common stock purchased under the repurchase program |  |  | 254,170 us-gaap_TreasuryStockValueAcquiredCostMethod |  |  |  |  |  |
Average market price of common stock purchased under the repurchase program (in dollars per share) |  |  | $ 2.84 us-gaap_TreasuryStockAcquiredAverageCostPerShare |  |  |  |  |  |
Number of shares of common stock yet to be purchased under the repurchase program | 160,356 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased |  | 160,356 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased |  | 160,356 us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased |  |  |  |
Stock Option Plan 1998 |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockOptionPlan1998Member | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockOptionPlan1998Member |  |  |  |  |
Options granted |  |  |  |  | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = issc_StockOptionPlan1998Member |  |  |  |
Number of shares of common stock reserved for awards | 3,389,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = issc_StockOptionPlan1998Member |  | 3,389,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = issc_StockOptionPlan1998Member |  | 3,389,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = issc_StockOptionPlan1998Member |  |  |  |
Restricted Stock Plan 2003 |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Share-based compensation expense |  |  | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_RestrictedStockPlan2003Member | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_RestrictedStockPlan2003Member |  |  |  |  |
Number of quarterly installments of shares awards |  |  | 4 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfQuarterlyInstallmentsOfAwardsGranted / us-gaap_PlanNameAxis = issc_RestrictedStockPlan2003Member |  |  |  |  |  |
Restricted Stock Plan 2003 | Non Employee Director |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Fair market value of annual award of non-vested shares |  |  |  |  |  |  |  | 40,000 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAnnualNonvestedStockFairValue / us-gaap_PlanNameAxis = issc_RestrictedStockPlan2003Member / us-gaap_TitleOfIndividualAxis = issc_NonEmployeeDirectorMember |
Stock Based Incentive Compensation Plan 2009 |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Share-based compensation expense | 96,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member | 205,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member | 350,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member | 440,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  |  |  |  |
Number of shares of common stock available for awards under the plan | 332,190 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  | 332,190 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  | 332,190 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  |  |  |
Number of shares of common stock reserved for awards | 1,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  | 1,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  | 1,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member |  |  |  |
Stock Based Incentive Compensation Plan 2009 | Non Employee Director |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Share-based compensation expense | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_NonEmployeeDirectorMember | 50,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_NonEmployeeDirectorMember | 150,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_NonEmployeeDirectorMember | 100,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_NonEmployeeDirectorMember |  |  |  |  |
Fair market value of annual award of non-vested shares |  |  |  |  |  |  |  |  | 40,000 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAnnualNonvestedStockFairValue / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_NonEmployeeDirectorMember
Stock Based Incentive Compensation Plan 2009 | Employee |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ 96,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember | $ 155,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember | $ 200,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember | $ 340,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember |  |  |  |  |
Stock Based Incentive Compensation Plan 2009 | Performance Shares | Employee |  |  |  |  |  |  |  |  |
Share-based compensation |  |  |  |  |  |  |  |  |
Maximum award (in shares) | 300,000 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAward / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember |  | 300,000 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAward / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember |  | 300,000 issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAward / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_PlanNameAxis = issc_StockBasedIncentiveCompensationPlan2009Member / us-gaap_TitleOfIndividualAxis = issc_EmployeeMember |  |  |  |

X
- Definition Represents the fair market value of annual non-vested awards under the terms of the arrangement. + References No definition available. + Details
Name: | issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAnnualNonvestedStockFairValue
Namespace Prefix: | issc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the number of quarterly installments of non-vested awards granted under the terms of the arrangement. + References No definition available. + Details
Name: | issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfQuarterlyInstallmentsOfAwardsGranted
Namespace Prefix: | issc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum award that a participant can receive, in shares, under the terms of a share based compensation plan. + References No definition available. + Details
Name: | issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAward
Namespace Prefix: | issc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of plans of share-based compensation arrangements maintained by the entity. + References No definition available. + Details
Name: | issc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPlans
Namespace Prefix: | issc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | issc_StockRepurchaseProgramAbstract
Namespace Prefix: | issc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) in additional paid in capital (APIC) resulting from a tax benefit (deficiency) associated with an share-based compensation plan other than an employee stock ownership plan (ESOP). + References No definition available. + Details
Name: | us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + 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 210.5-02.29) -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 30 -Article 5 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + 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 210.5-02.28) -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 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PlanNameAxis=issc_RestrictedStockPlan2003Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=issc_StockBasedIncentiveCompensationPlan2009Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=issc_StockOptionPlan1998Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |