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Summary of Significant Accounting Policies (Policies) | 9 Months Ended
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Jun. 30, 2021
Summary of Significant Accounting Policies |
Basis of Presentation | 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, 2020 is derived from the audited financial statements of the Company. Operating results for the three-and nine-month periods ended June 30, 2021 are not necessarily indicative of the results that may be expected for the fiscal year ending September 30, 2021, including in terms of the impact of the coronavirus pandemic (the “COVID-19 pandemic”), which cannot be determined at this time. 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, 2020.
Principles of Consolidation | Principles of Consolidation 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.
Impact of the COVID-19 Pandemic | Impact of the COVID-19 Pandemic The ongoing global outbreak of coronavirus, which was declared a pandemic by the World Health Organization on March 11, 2020 and a national emergency by the President of the United States on March 13, 2020, has caused and is continuing to cause business slowdowns and shutdowns and turmoil in the financial markets both in the United States and abroad. IS&S is monitoring the impact of the COVID-19 pandemic on its business, including how it has impacted and will impact the Company's employees, customers, suppliers and distribution channels. The Company has not yet seen a material impact from the COVID-19 pandemic on its business, financial position, liquidity, or ability to service customers or maintain critical operations. However, the COVID-19 pandemic, as well as the quarantines and other governmental and non‑governmental restrictions which have been imposed throughout the world in an effort to contain or mitigate the spread of the coronavirus (including recent developments as a result of newer variants or strains of SARS‑CoV‑2), has created significant volatility, uncertainty and disruption which may adversely affect IS&S’ business and has caused and is continuing to cause significant market turbulence and disruption that may continue for some time even after business restrictions are lifted and the threat of the coronavirus diminishes. As a result, the Company may face liquidity shortages, weaker product demand from its customers, disruptions in its supply chain, and/or staffing shortages in its workforce for the foreseeable future due to the direct and indirect effects of the COVID-19 pandemic.
Use of Estimates | Use of Estimates The financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America, which require management to make estimates and assumptions that affect the amounts reported in the financial statements. Actual results could differ from those estimates. Estimates are used in accounting for, among other items, long term contracts, allowances for doubtful accounts, inventory obsolescence, product warranty cost liabilities, income taxes, engineering and material costs on Engineering Development Contract (“EDC”) programs, percentage of completion on EDC contracts, recoverability of long-lived assets and contingencies. Estimates and assumptions are reviewed periodically and the effects of changes, if any, are reflected in the consolidated statements of operations in the period they are determined.
Cash and Cash Equivalents | 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 June 30, 2021 and September 30, 2020 consist of cash on deposit and cash invested in money market funds with financial institutions.
Restricted Cash | Restricted Cash On September 4, 2020, the Company’s Board of Directors declared a special cash dividend in the amount of $0.65 per share, payable on October 1, 2020 to shareholders of record as of the close of business on September 15, 2020. The total dividend payment was approximately $11.2 million and is included in restricted cash on the accompanying condensed consolidated balance sheet as of September 30, 2020. On December 10, 2020, the Company's Board of Directors declared a special cash dividend in the amount of $0.50 per share, payable on December 30, 2020 to shareholders of record as of the close of business on December 21, 2020. The total dividend payment was approximately $8.6 million. The declaration and payment of any dividend in the future will be at the discretion of the Company’s Board of Directors. The Company did not pay dividends in the three- and nine-month periods ended June 30, 2020. As of June 30, 2021, the Company had $7.5 million in cash and cash equivalents and $0 in restricted cash. Total cash and cash equivalents and restricted cash as of June 30, 2021 was $7.5 million. As of September 30, 2020, the Company had $12.6 million in cash and cash equivalents and $11.2 million in restricted cash. Total cash and cash equivalents and restricted cash as of September 30, 2020 was $23.8 million.
Inventory Valuation | Inventory Valuation Inventories are stated at the lower of cost (first-in, first-out) or net realizable value, net of write-downs for excess and obsolete inventory.
Property and Equipment | 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 lease term), except for the manufacturing facility and the corporate airplanes, which are depreciated using the straight-line method over their estimated useful lives of thirty-nine years and ten years, respectively. Major additions and improvements are capitalized, while maintenance and repairs that do not improve or extend the life of assets are charged to expense as incurred.
Long-Lived Assets | 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.” 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 should 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 then compares the carrying amount of the asset to estimated future cash flows expected to result 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 generally measured by discounting expected future cash flows. No impairment charges were recorded during the three-and nine-month periods ended June 30, 2021 or 2020.
Fair Value of Financial Instruments | Fair Value of Financial Instruments The net carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and short-term debt 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 June 30, 2021 and September 30, 2020, according to the valuation techniques the Company used to determine their fair values. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement on June 30, 2021
​ | ​ | 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 |  | $ | 6,051,871 |  | $ | — |  | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Fair Value Measurement on September 30, 2020
​ | ​ | 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 |  | $ | 11,607,293 |  | $ | — |  | $ | —
​
Revenue Recognition | 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, autothrottles 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. Revenue from Contracts with Customers The Company adopted ASC 606 on October 1, 2018 using the modified retrospective method for all contracts not completed as of the date of adoption. The reported results for fiscal years ended September 30, 2021 and 2020 reflect the application of ASC 606 guidance. The adoption of ASC 606 represents a change in accounting principles. In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled to receive in exchange for these goods or services. To achieve this core principle, the Company applies the following five steps:
| 1) | Identify the contract with a customer
The Company’s contract with its customers typically is the form of a purchase order issued to the Company by its customers and, to a lesser degree, in the form of a purchase order issued in connection with a formal contract executed with a customer. For the purpose of accounting for revenue under ASC 606, a contract with a customer exists when (i) the Company enters into an enforceable contract with a customer that defines each party’s rights regarding the goods or services to be transferred and identifies the payment terms related to these goods or services, (ii) the contract has commercial substance and, (iii) the Company determines that collection of substantially all consideration for goods or services that are transferred is probable based on the customer’s intent and ability to pay the promised consideration. The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information pertaining to the customer.
| 2) | Identify the performance obligations in the contract
Performance obligations promised in a contract are identified based on the goods or services that will be transferred to the customer that are both capable of being distinct, whereby the customer can benefit from the good or service either on its own or together with other resources that are readily available from third parties or from the Company, and are distinct in the context of the contract, whereby the transfer of the goods or services is separately identifiable from other promises in the contract. Most of our revenue is derived from purchases under which we provide a specific product or service and, as a result, there is only one performance obligation. In the event that a contract includes multiple promised goods or services, such as an EDC contract which includes both engineering services and a resulting product shipment, the Company must apply judgment to determine whether promised goods or services are capable of being distinct in the context of the contract. In these cases, the Company considers whether the customer could, on its own, or together with other resources that are readily available from third parties, produce the physical product using only the output resulting from the Company’s completion of engineering services. If the customer cannot produce the physical product, then the promised goods or services are accounted for as a combined performance obligation.
| 3) | Determine the transaction price
The transaction price is determined based on the consideration to which the Company will be entitled in exchange for transferring goods or services to the customer. To the extent the transaction price includes variable consideration, the Company estimates the amount of variable consideration that should be included in the transaction price utilizing either the expected value method or the most likely amount method depending on the nature of the variable consideration. Variable consideration is included in the transaction price if, in the Company’s judgment, it is probable that a significant future reversal of cumulative revenue under the contract will not occur. None of the Company's contracts for all periods presented included variable consideration.
| 4) | Allocate the transaction price to performance obligations in the contract
If the contract contains a single performance obligation, the entire transaction price is allocated to the single performance obligation. The Company determines standalone selling price based on the price at which the performance obligation is sold separately. If the standalone selling price is not observable through past transactions, the Company estimates the standalone selling price by taking into account available information such as market conditions as well as the cost of the goods or services and the Company’s normal margins for similar performance obligations.
| 5) | Recognize revenue when or as the Company satisfies a performance obligation
The Company satisfies performance obligations either over time or at a point in time as discussed in further detail below. Revenue is recognized at the time the related performance obligation is satisfied by transferring a promised good or service to a customer. Revenue from products transferred to customers at a point in time accounted for 100 percent and 93 percent of our revenue for the three months ended June 30, 2021 and 2020, respectively, and is typically recognized at the time of shipment of products to the customer. Revenue from products transferred to customers at a point in time accounted for 100 percent and 95 percent of our revenue for the nine months ended June 30, 2021 and 2020, respectively. The remaining revenue results from EDC contracts and is recognized over time using an input measure (e.g., costs incurred to date relative to total estimated costs at completion) to measure progress. Contract costs include material, components and third-party avionics purchased from suppliers, direct labor, and overhead costs. Contract Estimates Accounting for performance obligations in long-term contracts that are satisfied over time involves the use of various techniques to estimate progress towards satisfaction of the performance obligation. The Company typically measures progress based on costs incurred compared to estimated total contract costs. Contract cost estimates are based on various assumptions to project the outcome of future events that often span more than a single year. These assumptions include the amount of labor and labor costs, the quantity and cost of raw materials used in the completion of the performance obligation, and the complexity of the work to be performed. As a significant change in one or more of these estimates could affect the profitability of our contracts, we review and update our contract-related estimates regularly. We recognize adjustments in estimated profit on contracts under the cumulative catch-up method. Under this method, the impact of the adjustment on profit recorded to date is recognized in the period the adjustment is identified. Revenue and profit in future periods of contract performance is recognized using the adjusted estimate. If at any time the estimate of contract profitability indicates an anticipated loss on the contract, we recognize the total loss in the quarter it is identified. The impact of adjustments in contract estimates on our operating earnings can be reflected in either operating costs and expenses or revenue. The aggregate impact of adjustments in contract estimates did not change our revenue and operating earnings (and diluted earnings per share) for the three- and nine-month periods ended June 30, 2021 and 2020, respectively. Therefore, no adjustment on any contract was material to our unaudited consolidated financial statements for the three-and nine-month periods ended June 30, 2021 and 2020, respectively. Contract Balances Contract assets consist of the right to consideration in exchange for product offerings that we have transferred to a customer under the contract. Contract liabilities primarily relate to consideration received in advance of performance under the contract. As of June 30, 2021, approximately $1,456,000 of contract liabilities is from one customer. The following table reflects the Company’s contract assets and contract liabilities: ​
​ | ​ | ​ | ​
​ | ​ | Contract
​ |  | Liabilities
​ | ​ | ​ | ​
September 30, 2020 | ​ | $ | 313,365
Amount transferred to receivables from contract assets | ​ | ​ | —
Contract asset additions | ​ | ​ | —
Performance obligations satisfied during the period that were included in the contract liability balance at the beginning of the period | ​ | ​ | (305,494)
Increases due to invoicing prior to satisfaction of performance obligations | ​ | ​ | 1,520,823
June 30, 2021 | ​ | $ | 1,528,694
​ 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 are included in product sales and product cost of sales, respectively, on the accompanying consolidated statements of operations. The Company’s customer service revenue and cost of sales for the three-and nine-month periods ended June 30, 2021 and 2020 respectively are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended June 30, |  | For the Nine Months Ended June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Customer Service Sales |  | $ | 980,845 |  | $ | 906,662 | ​ | $ | 3,010,720 | ​ | $ | 3,302,346
Customer Service Cost of Sales | ​ | ​ | 408,161 | ​ | ​ | 320,428 | ​ | ​ | 1,079,462 | ​ | ​ | 1,072,397
Gross Profit | ​ | $ | 572,684 | ​ | $ | 586,234 | ​ | $ | 1,931,258 | ​ | $ | 2,229,949
Lease Recognition | Lease Recognition On October 1, 2019, we adopted Accounting Standards Update (“ASU”) 2016-02 using the required modified retrospective approach. This pronouncement requires lessees to record “right-of-use” assets and corresponding lease liabilities on the balance sheet for most leases. We adopted this pronouncement utilizing the transition practical expedient which eliminated the requirement that entities apply the new lease standard to the comparative periods presented in the year of adoption. See Note 7, “Leases,” to the unaudited condensed consolidated financial statements for a discussion of the impact resulting from the adoption of this guidance.
Income Taxes | Income Taxes Income taxes are recorded in accordance with 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 (“NOLs”) 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 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 periods. Deferred tax assets are reduced by a valuation allowance 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 verified objectively, and significant management judgment is required in determining any valuation allowance recorded against net deferred tax assets. The Company evaluates deferred income taxes on a quarterly basis to determine if a valuation allowance is 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 carryforwards, taxable income in carry-back years, and tax planning strategies which are both prudent and feasible. For the quarter ended June 30, 2021, the valuation allowance was released for all federal and state deferred tax assets with the exception of certain state net operating losses for jurisdictions in which the Company does not believe these net operating losses are more likely than not to be realized. The Company will continue to assess all available evidence during future periods to evaluate any changes to the realization of its deferred tax assets. If the Company were to determine that it would be able to realize additional state deferred tax assets in the future, it would make an adjustment to the valuation allowance which would reduce the provision for income taxes. 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 U.S. 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 a 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 it has made adequate accruals 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 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. On December 22, 2017, the U.S. government enacted the Tax Act, which made broad and complex changes to the U.S. tax code, including, but not limited to, (1) reducing the U.S. federal corporate tax rate from 34 percent to 21 percent; (2) bonus depreciation that will allow for full expensing of qualified property; (3) elimination of the corporate alternative minimum tax (“AMT”) and changing how existing AMT credits can be realized; (4) a new limitation on deductible interest expense; (5) the repeal of the domestic production activity deduction; and (6) limitations on NOLs generated after December 31, 2017, to 80 percent of taxable income. The Tax Act reduced the corporate tax rate to 21 percent, effective January 1, 2018. Consequently, we recorded a provisional adjustment to decrease related to deferred tax assets and liabilities with a corresponding net adjustment to deferred income tax expense of $321,038 for the period ended December 31, 2017. This expense is offset fully by a change in the valuation allowance. In March 2020, in response to the COVID-19 pandemic, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into law to provide emergency assistance to affected individuals, families, and businesses. The CARES Act provides numerous tax provisions and other stimulus measures, including temporary changes regarding the prior and future utilization of NOLs. The CARES Act amended the NOL provisions of the Tax Act, allowing for the carryback of losses arising in tax years beginning before December 31, 2017, to each of the two taxable years preceding the taxable year of loss. Approximately $1,500,000 of pre-tax NOL was carried back two years to fully offset taxable income. This carryback frees up previously utilized R&D credits, resulting in an estimated increase in R&D credit carryforward of $196,000. The carryback created approximately $16,000 of AMT tax, which was refunded. The cash impact of this carryback was $309,412. A receivable was setup for this amount as of March 31, 2020 and the cash has since been received. On December 27, 2020, the Consolidations Appropriations Act of 2020 (the “CAA") was enacted as a supplement to the CARES legislation providing additional financial relief to taxpayers adversely impacted by restrictions put into place in response to the COVID-19 pandemic. In addition, the CCA provides funding for public health initiatives in response to the pandemic. This legislation does not have a material impact on the Company's tax position. On March 11, 2021, the American Rescue Plan Act of 2021 (the “ARPA”), which includes certain business tax provisions, was signed into law. The Company does not expect the ARPA to have a material impact on Company’s effective tax rate or income for fiscal year ending on September 30, 2021.
Engineering Development | Engineering Development The Company invests a significant percentage of its sales on engineering development, both Research & Development (“R&D”) and EDC. At June 30, 2021, approximately 21% of the Company’s employees were engineers engaged in various engineering development projects. Total engineering development expense comprises both internally funded R&D and product development and design charges related to specific customer contracts. Engineering development 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. Product development and design charges related to specific customer contracts 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 We account for treasury stock purchased under the cost method and include treasury stock as a component of shareholders’ equity. Treasury stock purchased with intent to retire (whether or not the retirement is actually accomplished) is charged to common stock.
Comprehensive Income | Comprehensive Income Pursuant to FASB ASC Topic 220, “Comprehensive Income,” the Company is required to classify items of other comprehensive income by their nature in a financial statement and 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 nine-month periods ended June 30, 2021 and 2020, comprehensive income consisted of net income only, and there were no items of other comprehensive income for any of the periods presented.
Share-Based Compensation | Share-Based Compensation The Company accounts for share-based compensation under ASC Topic 718, “Stock Compensation” (“ASC Topic 718”), which requires 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. The Company recognizes such cost over the period during which an employee or non-employee director is required to provide service in exchange for the award. Accordingly, adoption of ASC Topic 718’s fair value method results in recording compensation costs under the Company’s stockbased compensation plans. The Company determined the fair value of its stock option awards at the date of grant using the BlackScholes option pricing model. Option pricing models and generally accepted valuation techniques require management to make assumptions and to apply judgment to determine the fair value of its awards. These assumptions and judgments include estimating future volatility of the Company’s stock price, expected dividend yield, future employee turnover rates, and future employee stock option exercise behaviors. Changes in these assumptions can materially affect fair value estimates. The Company does not believe that a reasonable likelihood exists that there will be a material change in future estimates or assumptions used to determine share-based compensation expense. However, if actual results are not consistent with the Company’s estimates or assumptions, the Company would adjust its estimates. Such adjustments could have a material impact on the Company’s financial position.
Warranty Reserves | Warranty Reserves The Company offers warranties on some products of various lengths, however the standard warranty period is twenty-four months. 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 differ from 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 recorded as an accrued expense. While the Company maintains product quality programs and processes, its warranty obligation is 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 | Self-Insurance Reserves Since January 1, 2014, the Company has self-insured 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 such as historical claims experience and demographic factors. The Company estimated the total medical claims incurred but not reported and the Company believes that it has adequate reserves for these claims at June 30, 2021 and September 30, 2020, respectively. However, the actual value of such claims could be significantly affected if future occurrences and claims differ from these assumptions. At June 30, 2021 and September 30, 2020, the estimated liability for medical claims incurred but not reported was approximately $46,700 and $48,200, respectively. The Company has recorded the excess of funded premiums over estimated claims incurred but not reported of approximately $180,200 and $225,200 as a current asset in the accompanying condensed consolidated balance sheets as of June 30, 2021 and September 30, 2020, respectively.
Concentrations | Concentrations Major Customers and Products In the three-month period ended June 30, 2021, two customers, Pilatus Aircraft Ltd (“Pilatus”), and Textron Aviation, Inc. (“Textron”), accounted for 25%, and 21% of net sales, respectively. In the nine-month period ended June 30, 2021, two customers, Pilatus and Textron, accounted for 20% and 17% of net sales, respectively. In the three-month period ended June 30, 2020, two customers, Pilatus, and Kalitta Air (“Kalitta”), accounted for 37% and 11% of net sales, respectively. In the nine-month period ended June 30, 2020, two customers, Pilatus, and Kalitta accounted for 36% and 13%, respectively, of net sales. Major Suppliers The Company buys several of its components from sole source suppliers. Although there are a limited number of suppliers of particular components, management believes other suppliers could provide similar components on comparable terms. For the three- and nine-month periods ended June 30, 2021, the Company had three and one suppliers, respectively that were individually responsible for greater than 10% of the Company’s total inventory related purchases. For the three- and nine-month periods ended June 30, 2020, the Company had four and three 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 major 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 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.
Recent Accounting Pronouncements | Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)” (“ASU 2016-02”) as modified, which replaces existing leasing rules with a comprehensive lease measurement and recognition standard and expanded disclosure requirements. ASU 2016-02 will require lessees to recognize most leases on their balance sheets as liabilities, with corresponding “right-of-use” assets and is effective for annual reporting periods beginning after December 15, 2018, subject to early adoption. For income statement recognition purposes, leases will be classified as either a finance or an operating lease without relying upon the bright-line tests under current GAAP. In transition, lessees and lessors are required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The modified retrospective approach includes a number of optional practical expedients that we may elect to apply. These practical expedients relate to the identification and classification of leases that commenced before the effective date, initial direct costs for leases that commenced before the effective date, and the ability to use hindsight in evaluating lessee options to extend or terminate a lease or to purchase the underlying asset. An entity that elects to apply the practical expedients will, in effect, continue to account for leases that commence before the effective date in accordance with previous GAAP unless the lease is modified, except that lessees are required to recognize a right-of-use asset and a lease liability for all operating leases at each reporting date based on the present value of the remaining minimum rental payments that were tracked and disclosed under previous GAAP. We adopted ASU 2016-02 effective October 1, 2019 using the required modified retrospective approach. See Note 18, “Lease Recognition,” to the consolidated financial statements for a discussion of the impact resulting from the adoption of this guidance. In June 2016, FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instrument (“ASU 2016-13”). ASU 2016-13 replaces the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. ASU 2016-13 is effective for SEC small business filers for fiscal years beginning after December 15, 2022. Management is currently assessing the impact ASU 2016-13 will have on the Company. In August 2018, the FASB issued ASU 2018-13, “Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement,” (“ASU 2018-13”) which modifies the disclosures on fair value measurements by removing the requirement to disclose the amount and reason for transfers between Level 1 and Level 2 of the fair value hierarchy and the policy for timing of such transfers. The ASU expands the disclosure requirements for Level 3 fair value measurements, primarily focused on changes in unrealized gains and losses included in other comprehensive income. We adopted this update effective October 1, 2020. The adoption of this standard did not have a material impact on our condensed consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes” (“ASU 2019-12”), which simplifies the accounting for income taxes, eliminates certain exceptions within Accounting Standards Codification Topic 740, “Income Taxes” (“ASC 740”), and clarifies certain aspects of ASC 740 to promote consistency among reporting entities. ASU 2019-12 is effective for us beginning October 1, 2021, with early adoption permitted. Most amendments within ASU 2019-12 are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. We are currently evaluating the potential impact of adopting this guidance on our consolidated financial statements. As new accounting pronouncements are issued, we will adopt those that are applicable.

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