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Note 4 - Fair Value of Financial Instruments | 6 Months Ended
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Mar. 31, 2023
Notes to Financial Statements |
Fair Value Disclosures [Text Block] | 4. Fair Value of Financial Instruments The Company’s financial instruments generally include cash and cash equivalents, short-term investments, trade accounts and notes receivable and accounts payable. Due to the short-term maturities of cash and cash equivalents, trade accounts and notes receivable and accounts payable, the carrying amounts of these financial instruments are deemed to approximate their fair value on the respective balance sheet dates. The valuation technique used to measure the fair value of the contingent consideration was based on internal estimates and the use of internal projections of future revenue. The Company measures its short-term investments and contingent consideration at fair value on a recurring basis. The following tables present the fair value of the Company’s short-term investments and contingent consideration by valuation hierarchy and input (in thousands):
|  | As of September 30, 2022 |
|  | Quoted Prices in |  |  | Significant |  |  |  |  |  |  |  |  |
|  | Active Markets for |  |  | Other |  |  | Significant |  |  |  |  |
|  | Identical Assets |  |  | Observable |  |  | Unobservable |  |  |  |  |
|  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |  |  | Totals |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | — |  |  | $ | 894 |  |  | $ | — |  |  | $ | 894 |
Total assets |  | $ | — |  |  | $ | 894 |  |  | $ | — |  |  | $ | 894 |
Contingent consideration liabilities: |  | $ | — |  |  | $ | — |  |  | $ | 175 |  |  | $ | 175 |
Total liabilities |  | $ | — |  |  | $ | — |  |  | $ | 175 |  |  | $ | 175 |
The Company had no short-term investments or contingent consideration payable at March 31, 2023. The following table summarizes changes in the fair value of the Company’s Level 3 financial instruments for the six months ended March 31, 2023 and 2022 (in thousands):
Contingent consideration balance at October 1, 2022 |  | $ | 175 |
Fair value adjustments |  |  | — |
Payment of contingent consideration |  |  | (175 | )
Contingent consideration at March 31, 2023 |  | $ | — |
Contingent consideration balance at October 1, 2021 |  | $ | 6,017 |
Fair value adjustments |  |  | (4,658 | )
Payment of contingent consideration |  |  | (807 | )
Contingent consideration balance at March 31, 2022 |  | $ | 552 |
Adjustments to the fair value of the contingent consideration were based on internal estimates and management assessments regarding potential future scenarios which involved significant judgment.

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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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