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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income | $ 200,268 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 1,886,917 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 2,978,994 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Adjustments to reconcile net income to net cash (used in) provided by operating activities: |  |  |
Depreciation and amortization | 576,478 us-gaap_DepreciationDepletionAndAmortization | 545,620 us-gaap_DepreciationDepletionAndAmortization | 529,325 us-gaap_DepreciationDepletionAndAmortization
Share-based compensation expense |  |  |
Stock options | 660,136 us-gaap_StockOptionPlanExpense | 712,395 us-gaap_StockOptionPlanExpense | 444,507 us-gaap_StockOptionPlanExpense
Stock awards | 150,055 us-gaap_RestrictedStockExpense | 200,008 us-gaap_RestrictedStockExpense | 199,998 us-gaap_RestrictedStockExpense
Tax adjustment from share-based compensation | (252,688)issc_ShareBasedCompensationTaxAdjustment | (33,301)issc_ShareBasedCompensationTaxAdjustment | (5,422)issc_ShareBasedCompensationTaxAdjustment
Recovery of loss on accounts receivable |  |  | (1,373)us-gaap_ProvisionForDoubtfulAccounts
Provision for loss on unbilled receivables | 3,680,679 issc_ProvisionForLossOnUnbilledReceivables |  |
(Gain) loss on disposal of property and equipment | 78 us-gaap_GainLossOnSaleOfPropertyPlantEquipment | (11,536)us-gaap_GainLossOnSaleOfPropertyPlantEquipment |
Excess and obsolete inventory cost | 196,205 us-gaap_InventoryWriteDown | 48,450 us-gaap_InventoryWriteDown | 113,456 us-gaap_InventoryWriteDown
Deferred income taxes | (648,456)us-gaap_DeferredIncomeTaxesAndTaxCredits | (215,424)us-gaap_DeferredIncomeTaxesAndTaxCredits | (2,434,379)us-gaap_DeferredIncomeTaxesAndTaxCredits
(Increase) decrease in: |  |  |
Accounts receivable | 69,571 us-gaap_IncreaseDecreaseInAccountsReceivable | (510,922)us-gaap_IncreaseDecreaseInAccountsReceivable | (853,025)us-gaap_IncreaseDecreaseInAccountsReceivable
Unbilled receivables | (4,566,965)us-gaap_IncreaseDecreaseInUnbilledReceivables | (4,944,006)us-gaap_IncreaseDecreaseInUnbilledReceivables | (1,210,796)us-gaap_IncreaseDecreaseInUnbilledReceivables
Inventories | (1,289,478)us-gaap_IncreaseDecreaseInInventories | (624,416)us-gaap_IncreaseDecreaseInInventories | (406,408)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets | (107,899)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (206,002)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | 54,788 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Other non-current assets | 105,886 us-gaap_IncreaseDecreaseInOtherNoncurrentAssets | (116,333)us-gaap_IncreaseDecreaseInOtherNoncurrentAssets |
Increase (decrease) in: |  |  |
Accounts payable | 30,515 us-gaap_IncreaseDecreaseInAccountsPayable | 1,232,673 us-gaap_IncreaseDecreaseInAccountsPayable | 695,948 us-gaap_IncreaseDecreaseInAccountsPayable
Accrued expenses | 557,222 us-gaap_IncreaseDecreaseInAccruedLiabilities | 744,085 us-gaap_IncreaseDecreaseInAccruedLiabilities | 192,101 us-gaap_IncreaseDecreaseInAccruedLiabilities
Income taxes payable | (152,608)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | 118,502 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | (110,805)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Deferred revenue | 78,795 us-gaap_IncreaseDecreaseInDeferredRevenue | (979,027)us-gaap_IncreaseDecreaseInDeferredRevenue | 1,193,922 us-gaap_IncreaseDecreaseInDeferredRevenue
Net cash (used in) provided by operating activities | (712,206)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | (2,152,317)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations | 1,380,831 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | (719,522)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (605,301)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (217,533)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from the sale of property and equipment | 600 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | 18,500 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment |
Net cash (used in) investing activities | (718,922)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (586,801)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations | (217,533)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from exercise of stock options | 259,505 us-gaap_ProceedsFromStockOptionsExercised | 1,156,039 us-gaap_ProceedsFromStockOptionsExercised |
Purchases of treasury stock |  | (696)us-gaap_PaymentsForRepurchaseOfCommonStock | (798,462)us-gaap_PaymentsForRepurchaseOfCommonStock
Dividend paid |  | (25,007,519)us-gaap_PaymentsOfDividends |
Repayment of capitalized lease obligations |  |  | (13,189)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Net cash provided by (used in) financing activities | 259,505 us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (23,852,176)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations | (811,651)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net increase (decrease) in cash and cash equivalents | (1,171,623)us-gaap_NetCashProvidedByUsedInContinuingOperations | (26,591,294)us-gaap_NetCashProvidedByUsedInContinuingOperations | 351,647 us-gaap_NetCashProvidedByUsedInContinuingOperations
Cash and cash equivalents, beginning of year | 16,386,207 us-gaap_CashAndCashEquivalentsAtCarryingValue | 42,977,501 us-gaap_CashAndCashEquivalentsAtCarryingValue | 42,625,854 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of year | 15,214,584 us-gaap_CashAndCashEquivalentsAtCarryingValue | 16,386,207 us-gaap_CashAndCashEquivalentsAtCarryingValue | 42,977,501 us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION |  |  |
Cash paid for interest |  |  | 599 us-gaap_InterestPaid
Cash paid for income tax | 770,000 us-gaap_IncomeTaxesPaid | 250,000 us-gaap_IncomeTaxesPaid | 153,327 us-gaap_IncomeTaxesPaid
Cash received from income tax refund |  |  | $ 4,096 us-gaap_ProceedsFromIncomeTaxRefunds

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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The amount of cash received during the period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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