Summary of Significant Accounting Policies | 1. Summary of Significant Accounting Policies Description of the Company Innovative Solutions and Support, Inc. (the “Company” or “IS&S”) was incorporated in Pennsylvania on February 12, 1988. The Company operates in one business segment as a systems integrator that designs, manufactures, sells, and services air data equipment, engine display systems, standby equipment, primary flight guidance, and cockpit display systems for retrofit applications and original equipment manufacturers (“OEMs”). The Company supplies integrated Flight Management Systems (“FMS”), Flat Panel Display Systems (“FPDS”), Integrated Standby Units (“ISU”) and advanced Global Positioning System (“GPS”) receivers that enable reduced carbon footprint navigation. The Company has continued to position itself as a system integrator, which capability provides the Company with the potential to generate more substantive orders over a broader product base. The strategy, as both a manufacturer and integrator, is designed to leverage the latest technologies developed for the computer and telecommunications industries into advanced and cost-effective solutions for the general aviation, commercial air transport, United States Department of Defense (“DoD”)/governmental, and foreign military markets. This approach, combined with the Company’s industry experience, is designed to enable IS&S to develop high-quality products and systems, to reduce product time to market, and to achieve cost advantages over products offered by its competitors. Customers include commercial air transport carriers and corporate/general aviation companies, the DoD and its commercial contractors, aircraft operators, aircraft modification centers, foreign militaries, and various OEMs. Basis of Presentation The accompanying unaudited condensed consolidated financial statements are presented pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”) in accordance with the disclosure requirements for the quarterly report on Form 10-Q and, therefore, do not include all of the information and footnotes required by generally accepted accounting principles in the United States (“GAAP”) for complete annual financial statements. In the opinion of Company management, the unaudited condensed consolidated financial statements reflect all adjustments (consisting of normal recurring adjustments) necessary to state fairly the results for the interim periods presented. The condensed consolidated balance sheet as of September 30, 2015 is derived from the audited financial statements of the Company. Operating results for the three and six months ended March 31, 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending September 30, 2016. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes of the Company included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2015. The Company’s condensed consolidated financial statements include the accounts of its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Use of Estimates Preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities, as of the date of the financial statements and the reported amounts of net sales and expenses during the reporting period. Estimates are used in accounting for, among other items, long term contracts, allowance for doubtful accounts, inventory obsolescence, product warranty cost liabilities, income taxes, engineering and material costs on Engineering Development Contracts (“EDC”) programs, percentage-of-completion on EDC, recoverability of long-lived assets, stock-based compensation expense self-insurance reserves, and contingencies. Actual results could differ materially from those estimates. Cash and Cash Equivalents Highly liquid investments, purchased with an original maturity of three months or less, are classified as cash equivalents. Cash equivalents at March 31, 2016 and September 30, 2015 consist of funds invested in money market funds with financial institutions. Property and Equipment Property and equipment are stated at cost. Depreciation is provided using an accelerated method over the estimated useful lives of the assets (the lesser of three to seven years or over the related lease term), except for the manufacturing facility and the corporate airplane. The building is being depreciated on a straight line basis over 39 years. Major additions and improvements are capitalized. Maintenance and repairs that do not improve or extend the life of assets are charged to expense as incurred. The airplane was depreciated on a straight-line basis over its estimated useful life of ten years; however, because the airplane had been depreciated previously to its estimated salvage value, no depreciation expense was recorded for this asset during the six months ended March 31, 2016 or 2015, respectively . Fair Value of Financial Instruments The net carrying amounts of cash and cash equivalents, accounts receivable, and accounts payable approximate their fair value because of the short-term nature of these instruments. For financial assets and liabilities measured at fair value on a recurring basis, fair value is the price the Company would receive to sell an asset or pay to transfer a liability in an orderly transaction with a market participant at the measurement date. A three-level fair value hierarchy prioritizes the inputs used to measure fair value as follows: Level 1 — Unadjusted quoted prices that are available in active markets for the identical assets or liabilities at the measurement date. Level 2 — Other observable inputs available at the measurement date, other than quoted prices included in Level 1, either directly or indirectly, including: Quoted prices for similar assets or liabilities in active markets; Quoted prices for identical or similar assets in non-active markets; Inputs other than quoted prices that are observable for the asset or liability; and Inputs that are derived principally from or corroborated by other observable market data. Level 3 — Unobservable inputs that cannot be corroborated by observable market data and reflect the use of significant management judgment. These values are generally determined using pricing models for which the assumptions utilize management’s estimates of market participant assumptions. The following table sets forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2016 and September 30, 2015, according to the valuation techniques the Company used to determine their fair values. Fair Value Measurement on March 31, 2016 Quoted Price in Significant Other Significant Active Markets for Observable Unobservable Identical Assets Inputs Inputs (Level 1) (Level 2) (Level 3) Assets Cash and cash equivalents: Money market funds $ $ — $ — Fair Value Measurement on September 30, 2015 Quoted Price in Significant Other Significant Active Markets for Observable Unobservable Identical Assets Inputs Inputs (Level 1) (Level 2) (Level 3) Assets Cash and cash equivalents: Money market funds $ $ — $ — Long-Lived Assets The Company assesses the impairment of long-lived assets in accordance with Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 360-10, “Property, Plant and Equipment” (“ASC Topic 360-10”) . This statement requires that long-lived assets be reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. In addition, long-lived assets to be disposed of must be reported at the lower of the carrying amount or fair value less cost to sell. The Company considers historical performance and future estimated results in its evaluation of potential impairment and compares the carrying amount of the asset to estimated future cash flows expected from use of the asset. If the carrying amount of the asset exceeds the estimated expected undiscounted future cash flows, the Company measures the amount of the impairment by comparing the carrying amount of the asset to its fair value. The estimation of fair value is measured by discounting expected future cash flows. No impairment charges were recorded during the six months ended March 31, 2016 or 2015. Revenue Recognition The Company enters into sales arrangements with customers that, in general, provide for the Company to design, develop, manufacture, and deliver large flat-panel display systems, flight information computers and advanced monitoring systems that measure and display critical flight information, including data relative to aircraft separation, airspeed, altitude, and engine and fuel data measurements. The Company’s sales arrangements include multiple deliverables as defined in FASB ASC Topic 605-25 “Multiple-Element Arrangements” (“ASC Topic 605-25”), which typically include design and engineering services, and the production and delivery of the flat panel display and related components. The Company includes any design and engineering services elements in EDC sales and any functional upgrade and product elements in product sales in the accompanying consolidated statements of operations. To the extent that an arrangement contains software elements that are essential to the functionality of tangible products sold in the arrangement, the Company recognizes revenue for the deliverables in accordance with the guidance included in FASB Accounting Standards Update 2009-14, “ Revenue Arrangements That Include Software Elements ” (“ASU 2009-14”), FASB Accounting Standards Update 2009-13, “ Multiple-Deliverable Revenue Arrangements—a consensus of the FASB Emerging Issues Task Force ” (“ASU 2009-13”), and FASB ASC Topic 605, “ Revenue Recognition ” (“ASC Topic 605”). To the extent that an arrangement contains software components, which may include functional upgrades, that the Company sells on a standalone basis and which it has deemed outside the scope of the exception defined by ASU 2009-14, the Company recognizes software revenue in accordance with ASC Topic 985, “ Software ” (“ASC Topic 985”). Multiple Element Arrangements - The Company identifies all goods and/or services that are to be delivered separately under such a sales arrangement and allocates sales to each deliverable (if more than one) based on that deliverable’s fair value. The Company then considers the appropriate recognition method for each deliverable. The Company’s multiple element arrangements can include defined design and development activities, functional upgrades, and product sales. The Company utilizes the selling price hierarchy that has been established by ASU 2009-13, which requires that the selling price for each deliverable be based on vendor-specific objective evidence if available, third-party evidence if vendor-specific objective evidence is not available, or estimated selling price if neither vendor-specific objective evidence nor third-party evidence is available. To the extent that an arrangement includes a deliverable for which estimated selling price is used, the Company determines the best estimate of selling price by applying the same pricing policies and methodologies that would be used to determine the price to sell the deliverable on a standalone basis. To the extent that an arrangement contains defined design and EDC activities as identified deliverables and products (resulting in a multiple element arrangement), the Company recognizes as EDC sales amounts earned during the design and development phase of the contract following the guidance included in FASB ASC Topic 605-35, “Construction-Type and Production-Type Contracts” (“ASC Topic 605-35”) under the percentage of completion method. To the extent that multiple element arrangements include product sales, sales are generally recognized once revenue recognition criteria for the product deliverables have been met based on the provisions of ASC Topic 605. The Company includes any design and engineering services elements in EDC sales, and any functional upgrade and product elements in “product” sales on the accompanying consolidated statements of operations. Single Element Arrangements — Products - To the extent that a single element arrangement provides for product sales and repairs, the Company recognizes sales when revenue recognition criteria for the product deliverables have been met based on the provisions of ASC Topic 605. In addition, the Company receives orders for equipment and parts. Generally, revenue from the sale of such products is recognized upon shipment to the customer. The Company offers its customers extended warranties for additional fees. These warranty sales are recorded as deferred revenue and recognized as sales on a straight-line basis over the warranty period. Engineering Development Contracts The Company may enter into contracts to perform specified design and EDC services related to its products. The Company recognizes revenue from these arrangements as EDC sales, following the guidance included in ASC Topic 605-35, and considers the nature of these contracts (including term, size of contract, and level of effort) when determining the appropriate accounting treatment for a particular contract. Certain of these contracts are accounted for under the percentage-of-completion method of accounting when the Company determines that progress toward completion is reasonable and reliably estimable, and the contract is long-term in nature. The Company uses the completed contract method for all other contracts because these contracts are short-term in nature and meet the criteria set forth in ASC Topic 605-35. Sales and profit margins under the percentage-of-completion method are recorded based on the ratio of actual costs incurred to total estimated costs expected to be incurred related to the contract under the cost-to-cost method (for development effort). The percentage-of-completion method of accounting requires the Company to estimate the profit margin for each individual contract, and to apply that profit margin on a uniform basis as sales are recorded under the contract. The estimation of profit margin requires the Company to make projections of the total sales to be generated and the total costs that will be incurred under each contract. The projections require the Company to make numerous assumptions and estimates relating to items, such as the complexity of design and related development costs, performance of subcontractors, availability and cost of materials, engineering productivity and cost, overhead, and capital costs. Contracts sometimes include purchase options for additional quantities and customer change orders for additional or revised product functionality. Sales and costs related to profitable purchase options are included in the Company’s estimates only when the options are exercised, while sales and costs related to unprofitable purchase options are included in the Company’s estimates when exercise is determined to be probable. Sales related to change orders are included in profit estimates only if they can be reliably estimated and collectability is reasonably assured. Purchase options and change orders are accounted for, either as an integral part of the original contract or separately, depending upon the nature and value of the item. Anticipated losses on contracts are recognized in full in the period in which losses become probable and estimable. The Company reviews estimates of profit margins for contracts on a quarterly basis. The percentage-of-completion method results in the profit margin being recorded evenly as revenue is recognized under the contract. Changes in these underlying estimates because of revisions in revenue and cost estimates or to the exercise of contract options may result in profit margins being recognized unevenly over a contract as such changes are accounted for on a cumulative basis in the period estimates are revised. Significant changes in estimates related to accounting for long-term contracts may have a material effect on the Company’s results of operations in the period in which the revised estimate is made. Cumulative catch-up adjustments resulting from changes in estimates are disclosed in the notes to the consolidated financial statements of the Company. Customer Service Revenue The Company enters into sales arrangements with customers for the repair or upgrade of its various products that are not under warranty. The Company’s customer service revenue and cost of sales for the three and six months ended March 31, 2016 and 2015, respectively are as follows: For the Three Months Ended March 31, For the Six Months Ended March 31, 2016 2015 2016 2015 Customer Service Sales $ $ $ $ Customer Service Cost of Sales Gross Profit $ $ $ $ Income Taxes Income taxes are recorded in accordance with FASB ASC Topic 740, “Income Taxes” (“ASC Topic 740”), which utilizes a balance sheet approach to provide for income taxes. Under this method, the Company recognizes deferred tax assets and liabilities for temporary differences between the financial reporting basis and the tax basis of the Company’s assets, liabilities, and expected benefits of utilizing net operating losses (“NOL”) and tax credit carry-forwards. The impact on deferred taxes of changes in tax rates and laws, if any, are applied to the years during which temporary differences are expected to be settled and are reflected in the consolidated financial statements in the period of enactment. At the end of each interim reporting period, the Company prepares an estimate of the annual effective income tax rate and applies that annual effective income tax rate to ordinary year-to-date pre-tax income or loss for the interim period. Specific tax items discrete to a particular quarter are recorded in income tax expense for that quarter. The estimated annual effective tax rate used in providing for income taxes on a year-to-date basis may change in subsequent interim periods. Deferred tax assets are reduced by valuation allowances if, based on the consideration of all available evidence, it is more likely than not that some portion of the deferred tax asset will not be realized. Significant weight is given to evidence that can be objectively verified, and significant management judgment is required in determining any valuation allowances recorded against net deferred tax assets. The Company evaluates deferred income taxes on a quarterly basis to determine if valuation allowances are required by considering available evidence. Deferred tax assets are recognized when expected future taxable income is sufficient to allow the related tax benefits to reduce taxes that would otherwise be payable. The sources of taxable income that may be available to realize the benefit of deferred tax assets are future reversals of existing taxable temporary differences, future taxable income exclusive of reversing temporary differences and credit carry-forwards, taxable income in carry-back years, and tax planning strategies. In the period ended June 30, 2015, a valuation allowance was recorded on a majority of the Company’s federal and state deferred tax assets, net of liabilities, due to uncertainty with respect to the Company’s ability to generate sufficient future taxable income to realize such deferred tax assets. The remaining amount of the Company’s recognized deferred tax assets were related to tax planning strategies and the ability to carry-back federal tax losses to claim a tax refund. For the six months ended March 31, 2016, the valuation allowance was reduced due to the current year profitability of the Company which represents an additional source of taxable income to realize certain federal and state deferred tax assets. The Company will continue to maintain a valuation allowance until the Company generates a sufficient level of profitability to warrant a conclusion that it no longer is more likely than not that these net federal and state deferred tax assets will not be realized in future periods. The accounting for uncertainty in income taxes requires a more likely than not threshold for financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. The Company records a liability for the difference between the (i) benefit recognized and measured for financial statement purposes and (ii) the tax position taken or expected to be taken on the Company’s tax return. To the extent that the Company’s assessment of such tax positions changes, the change in estimate is recorded in the period in which the determination is made. The Company has elected to record any interest or penalties associated with uncertain tax positions as income tax expense. The Company files a consolidated United States federal income tax return. The Company prepares and files tax returns based on the interpretation of tax laws and regulations, and records estimates based on these judgments and interpretations. In the normal course of business, the tax returns are subject to examination by various taxing authorities. Such examinations may result in future tax and interest assessments by these taxing authorities, and the Company records a liability when it is probable that there will be an assessment. The Company adjusts the estimates periodically as the result of ongoing examinations by and settlements with the various taxing authorities and changes in tax laws, regulations and precedent. The consolidated tax provision of any given year includes adjustments to prior years’ income tax accruals that are considered appropriate and any related estimated interest. Management believes that adequate accruals have been made for income taxes. Differences between estimated and actual amounts determined upon ultimate resolution, individually or in the aggregate, are not expected to have a material adverse effect on the Company’s consolidated financial position but could possibly be material to its consolidated results of operations or cash flow of any one period. Engineering Development The Company invests a large percentage of its sales in engineering development, both research and development (“R&D”) and EDC. At March 31, 2016, approximately 35% of the Company’s employees were engaged in various engineering development projects. Total engineering development expense is comprised of both design and EDC related to specific customer contracts and R&D. EDC expense consists primarily of payroll-related expenses of employees engaged in EDC projects, engineering related product materials and equipment, and subcontracting costs. R&D charges incurred for product design, product enhancements and future product development are expensed as incurred. EDC and design charges related to specific customer arrangements are charged to cost of sales-EDC based on the method of contract accounting (either percentage-of-completion or completed-contract) applicable to such contracts. Treasury Stock Treasury stock is recorded at acquisition cost. Gains and losses on disposition are recorded as increases or decreases to additional paid-in capital with losses in excess of previously recorded gains charged directly to retained earnings. When treasury shares are retired and returned to authorized but unissued status, the carrying value in excess of par is allocated to additional paid-in capital and retained earnings on a pro rata basis. Comprehensive Income Pursuant to FASB ASC Topic 220, “Comprehensive Income” (“ASC Topic 220”), the Company is required to classify items of other comprehensive income by their nature in the balance sheet and to display the accumulated balance of other comprehensive income separately from retained earnings and additional paid-in capital in the equity section of its condensed consolidated balance sheets. For the three and six months ended March 31, 2016 and 2015, respectively, comprehensive income consisted of net income only. There were no items of other comprehensive income or accumulated other comprehensive income balances in the equity accounts for any of the periods presented. Share-Based Compensation The Company accounts for share-based compensation under FASB ASC Topic 505-50, “Equity-Based Payments to Non-Employees” (“ASC Topic 505-50”), and FASB ASC Topic 718, “Stock Compensation” (“ASC Topic 718”), which require the Company to measure the cost of employee or non-employee director services received in exchange for an award of equity instruments based on the grant-date fair value of the award using an option pricing model. That cost is recognized over the period during which an employee or non-employee director is required to provide service in exchange for the award. Warranty The Company offers warranties of various lengths. At the time of shipment, the Company establishes a reserve for estimated costs of warranties based on its best estimate of the amounts necessary to settle future and existing claims using historical data on products sold as of the balance sheet date. The length of the warranty period, the product’s failure rates, and the customer’s usage affect warranty cost. If actual warranty costs are higher than the Company’s estimated amounts, future results of operations could be affected adversely. Warranty cost is recorded as cost of sales, and the reserve balance is recorded as an accrued expense. Although the Company maintains product quality programs and processes, its warranty obligations are affected by product failure rates and the related corrective costs. If actual product failure rates and/or corrective costs differ from the estimates, the Company revises the estimated warranty liability accordingly. Self-Insurance Reserves Beginning January 1, 2014, the Company began self-insuring a significant portion of its employee medical insurance. The Company maintains a stop-loss insurance policy that limits its losses both on a per employee basis and an aggregate basis. Liabilities associated with the risks that are retained by the Company are estimated based upon actuarial assumptions including historical claim experience and demographic factors. The Company has estimated the total medical claims incurred but not reported and the Company believes that it has adequate reserves for these claims at March 31, 2016. However, the actual value of such claims could be significantly affected if future occurrences and claims differ from these assumptions. At March 31, 2016 and September 30, 2015, the estimated liability for medical claims incurred but not reported was $65,000 and $80,000 respectively. The Company has recorded the excess of funded premiums over estimated claims incurred but not reported in the amounts of $229,000 and $119,000 as a current asset in the accompanying condensed consolidated balance sheets as of March 31, 2016 and September 30, 2015, respectively. Concentrations Major Customers and Products For the three months ended March 31, 2016, three customers, Jet2.com Limited, a subsidiary of Dart Group PLC (“Jet2”), DHL Aviation Services (“DHL”) and FedEx Corporation (“Fed Ex”), accounted for 29%, 16% and 15% of net sales, respectively. During the six months ended March 31, 2016, two customers, Jet2 and DHL accounted for 20% and 19% of net sales, respectively. For the three months ended March 31, 2015, four customers, Pilatus Aircraft Limited (“Pilatus”), Eclipse Aerospace, Inc. (“Eclipse”), iAccess Technologies, Inc. (“iAccess”) and Icelandair, Inc. accounted for 33%, 22%, 12% and 10% of net sales, respectively. During the six months ended March 31, 2015, four customers, Pilatus, Eclipse, the DoD and iAccess accounted for 28%, 16%, 14% and 11% of net sales, respectively. Major Suppliers The Company buys several components from sole source suppliers. Although there are a limited number of manufacturers of particular components, the Company believes other suppliers could provide similar components on comparable terms. For the three and six months ended March 31, 2016, the Company had two suppliers and one supplier respectively that were individually responsible for greater than 10% of the Company’s total inventory related purchases. For the three and six months ended March 31, 2015, the Company had three and two suppliers respectively that were individually responsible for greater than 10% of the Company’s total inventory related purchases. Concentration of Credit Risk Financial instruments that potentially subject the Company to concentration of credit risk consist principally of cash balances and accounts receivable. The Company invests its excess cash where preservation of principal is the primary consideration. Cash balances are maintained with two major banks. Balances on deposit with certain money market accounts and operating accounts may exceed the Federal Deposit Insurance Corporation (“FDIC”) limits. The Company’s customer base consists principally of companies within the aviation industry. The Company requests advance payments and/or letters of credit from customers that it considers to be credit risks. As of March 31, 2016, the Company had allowances for doubtful accounts for unbilled receivables in the amount of $3.6 million related to the Delta contract (see “Note 6, Contingencies” for a description of the Delta contract). As of September 30, 2015, the Company had allowances for doubtful accounts for unbilled receivables of $1.3 million related to a certain customer contract and $3.6 million related to the Delta contract. In January 2016, the Company negotiated changes to its agreement with a customer whereby $1.3 million of unbilled receivables previously charged to bad debt expense in the quarter ended September 30, 2015 were cancelled. (See Unbilled Receivables below under Note 2. Supplemental Balance Sheet Disclosures). Recent Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (“FASB”) issued ASU 2016-09, “ Compensation - Stock Compensation - Improvements to Employee Share-Based Payment Accounting ” (“ASU 2016-09”), which involves several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. Under the new standard, income tax benefits and deficiencies are to be recognized as income tax expense or benefit in the income statement and the tax effects of exercised or vested awards should be treated as discrete items in the reporting period in which they occur. An entity should also recognize excess tax benefits regardless of whether the benefit reduces taxes payable in the current period. Excess tax benefits should be classified along with other income tax cash flows as an operating activity. In regards to forfeitures, the entity may make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur. This ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is permitted. The Company is assessing the impact the adoption of ASU 2016-09 will have on its financial statements. In February 2016, the FASB issued ASU 2016-02, “ Leases ” (“ASU 2016-02”). The new standard establishes a right-of-use (“ROU”) model that requires a lessee to record an ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. The Company is assessing the impact the adoption of ASU 2016-02 will have on its financial statements. In November 2015, the FASB issued guidance regarding Balance Sheet Classification of Deferred Taxes. Current guidance requ |