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Note 4 - Fair Value Measurements | 3 Months Ended
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Jun. 30, 2023
Notes to Financial Statements |
Fair Value Disclosures [Text Block] | Note 4. Fair Value Measurements Our financial instruments consist primarily of cash and cash equivalents, trade accounts receivable, obligations under trade accounts payable, and debt. Due to their short-term nature, the carrying values for cash and cash equivalents, trade accounts receivable, and trade accounts payable approximate fair value; they are classified within Level 1 of the fair value hierarchy. Historically, the financial instruments that subject us to the highest concentration of credit risk are cash and cash equivalents and accounts receivable. We maintain relationships and cash deposits at multiple banking institutions across the world in an effort to diversify and reduce risk of loss. Concentration of credit risk with respect to accounts receivable is limited to customers to whom we make significant sales. One distributor accounted for approximately 13% of total trade receivables as of June 30, 2023, compared to 18% as of our fiscal year ended March 31, 2023. The distributor's outstanding balance was current as of June 30, 2023, and the substantial majority has since been collected. We reserve an allowance for potential write-offs of accounts receivable using historical collection experience and current and expected future economic and market conditions. To manage credit risk, we consider the creditworthiness of new and existing customers, and we regularly review outstanding balances and payment histories. We may require pre-payments from customers under certain circumstances and may limit future purchases until payments are made on past due amounts. We have outstanding $172,500 aggregate principal of 1.375% convertible senior notes due August 15, 2025 (the "Notes"). We estimate the fair value of the Notes based on the last actively traded price or observable market input preceding the end of the reporting period, and the fair value is approximately correlated to our stock price. The estimated fair value and carrying value of the Notes was as follows:
|  | June 30, 2023 |  |  | March 31, 2023 |
|  | Carrying Value |  |  | Fair Value (Level 2) |  |  | Carrying Value |  |  | Fair Value (Level 2) |
Notes |  | $ | 170,502 |  |  | $ | 154,495 |  |  | $ | 170,272 |  |  | $ | 161,072 |
Amounts recognized or disclosed at fair value in the unaudited condensed consolidated financial statements on a nonrecurring basis include the initial recognition and disclosure of most assets and liabilities purchased in a business acquisition and any related measurement period adjustments. Additionally, assets such as property and equipment, operating lease assets, goodwill, and other intangible assets are adjusted to fair value if determined to be impaired. We recorded no impairments during the three months ended June 30, 2023 or 2022. Fair values of such assets and liabilities require measurement using Level 3 inputs. There were no transfers between the levels of the fair value hierarchy during the three months ended June 30, 2023 or 2022, respectively. We are obligated to pay contingent consideration of $1,500 cash related to the Belyntic acquisition upon approval of pending patent applications. The fair value of the contingent consideration was $1,137 as of June 30, 2023 and is recorded in other long-term liabilities on the accompanying Condensed Consolidated Balance Sheets. We estimated the fair value of the contingent consideration at inception using a probability-weighted outcome analysis based on our expectations of patent approval, leveraging our historical experience and expert input, and we adjust the contingent consideration to estimated fair value at each reporting period through earnings.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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