Use of Estimates

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The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of sales and costs of sales during the reporting period. The most significant of these estimates and assumptions for our company relate to contract revenue, profit and loss recognition, fair values of assets acquired and liabilities assumed in business combinations, values for inventories reported at lower of cost or net realizable value, stock-based compensation expense, income taxes, accrued warranty costs, and the recoverability, useful lives and valuation of recorded amounts of long-lived assets, identifiable intangible assets and goodwill. Changes in estimates are reflected in the periods during which they become known. Due to the inherent uncertainty involved in making estimates, our actual amounts reported in future periods could differ materially from these estimates.

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Earnings Per Share Computations

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We compute basic earnings per share by dividing net income available to common stockholders by the weighted average number of common shares outstanding during the period. We compute diluted earnings per share by dividing net income available to common stockholders by the sum of the weighted average number of common shares and dilutive potential common shares outstanding during the period. Potential common shares consist of the shares issuable upon the exercise of stock options and restricted stock unit awards under the treasury stock method. The underlying equity component of the 1.25% convertible senior notes due 2022 (the “Notes”) discussed in Note 6 to the condensed consolidated financial statements will have a net impact on diluted earnings per share when the average price of our common stock exceeds the conversion price because the principal amount of the Notes is intended to be settled in cash upon conversion. The dilutive effect of the Notes is included in the calculation below for the three months ended September 30, 2019. There was no dilutive effect of the Notes for the three months ended September 30, 2018.

Cash and Cash Equivalents

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We consider all highly liquid investments with maturities of three months or less as of the acquisition date to be cash equivalents.

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Our cash and cash equivalents totaled $85.1 million at September 30, 2019. Of this amount, approximately 71% was held by our foreign subsidiaries and subject to repatriation tax considerations. These foreign funds were held primarily by our subsidiaries in Singapore, the United Kingdom, Malaysia, Canada and to a lesser extent in Mexico, Germany, and Albania among others. We have cash holdings that exceed insured limits for financial institutions; however, we mitigate this risk by utilizing high credit quality financial institutions throughout the world.

Fair Value of Financial Instruments

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Our financial instruments consist primarily of cash and cash equivalents, marketable securities, insurance company contracts, accounts receivable, accounts payable and debt instruments. The carrying values of financial instruments, other than long term debt instruments, are representative of their fair values due to their short term maturities. The carrying values of our long term debt instruments are considered to approximate their fair values, as the interest rates of these instruments are variable or comparable to current rates available to us.

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Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.The "Level 1" category includes assets and liabilities measured at quoted prices in active markets for identical assets and liabilities. The"Level 2" category includes assets and liabilities measured from observable inputs other than quoted market prices.The "Level 3" category includes assets and liabilities for which valuation inputs are unobservable and significant to the fair value measurement. As of June 30, 2019 and September 30, 2019, there were no assets in the "Level 3" category. Our contingent payment obligations related to acquisitions, which are further discussed in Note 9 to the condensed consolidated financial statements, are in the “Level 3” category for valuation purposes.

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Revenue Recognition

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We recognize revenue under Accounting Standards Codification Topic 606, Revenue from Contracts with Customers (“ASC 606”), which superseded all prior revenue recognition methods and industry-specific guidance. The core principle of ASC 606 is that an entity should recognize revenue to depict the transfer of control for promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying the revenue principles, an entity is required to identify the contract(s) with a customer, identify the performance obligations, determine the transaction price, allocate the transaction price to the performance obligations and recognize revenue when the performance obligation is satisfied (i.e., either over time or at a point in time). ASC 606 further requires that companies disclose sufficient information to enable users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers.

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Product Sales. We recognize revenue from sales of products upon shipment or delivery when control of the product transfers to the customer, depending on the terms of each sale, and when collection is probable. In the circumstance where terms of a product sale include subjective customer acceptance criteria, revenue is deferred until we have achieved the acceptance criteria unless the customer acceptance criteria are perfunctory or inconsequential. We generally offer customers payment terms of less than one year. In cases when payment terms extend beyond one year, we consider whether the contract has a significant financing component.

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Service Revenue. Revenue from services includes installation and implementation of products and turnkey security screening services and after-market services. Generally, revenue from services is recognized over time as the services are performed. Revenues from out of warranty service maintenance contracts are recognized ratably over the respective terms of such contracts. Deferred revenue for such services arises from payments received from customers for services not yet performed.

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Lease Accounting

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Right of use (“ROU”) assets represent our right to use an underlying asset during the reasonably certain lease terms and lease liabilities represent our obligation to make lease payments arising from the leases. We recognize ROU lease assets and lease liabilities at lease commencement on our consolidated balance sheet based on the present value of lease payments over the lease term using a discount rate determined based on our incremental borrowing rate since the rate implicit in each lease is not readily determinable. We elected the package of practical expedients, which permits us to not reassess (1) whether any expired or existing contracts are or contain leases, (2) the lease classification of any expired or existing leases, and (3) any initial direct costs for any existing leases as of the effective date. We elected the practical expedient to account for each separate lease component of a contract and its associated non-lease components as a single lease component. We also elected the hindsight practical expedient, which allows us to use hindsight in determining the lease term. We do not record an ROU asset and corresponding lease liability for leases with an initial term of 12 months or less (“short-term leases”). The terms in our leases may include options to extend or terminate the lease. We recognize ROU assets and liabilities when it is reasonably certain that we will exercise those options. Judgment is required in our assessment as to whether renewal or termination options are reasonably certain to be exercised and factors such as contractual terms compared to current market rates, the importance of the facility and location to our operations, among others, are considered. Lease payments are made in accordance with the lease terms and lease expense, including short-term lease expense, is recognized on a straight-line basis over the lease term.

Recently Adopted Accounting Pronouncement

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Leases

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In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842)” (“ASC 842”), which requires lessees to recognize ROU assets and lease liabilities, initially measured at present value of the lease payments, on its balance sheet for leases and classified as either financing or operating leases. We adopted ASC 842 on July 1, 2019, using the modified retrospective method, and we elected the package of practical expedients provided in ASC 842. In accordance with ASC 842, we did not restate comparative periods and instead reported comparative prior year periods under ASC 840, “Leases.”

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