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Fair Value Measurements (Tables) | 12 Months Ended
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Sep. 30, 2021
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured at Fair Value on Recurring Basis | Assets and liabilities measured at fair value on a recurring basis by level of the fair value hierarchy were as follows:
|  | September 30, 2021 |
(In thousands) |  | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Total Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents (1) |  | $ | — |  |  | $ | 5,308 |  |  | $ | — |  |  | $ | 5,308 |
Available-for-sale investments (1) |  |  | — |  |  |  | 9,719 |  |  |  | — |  |  |  | 9,719 |
Total assets |  | $ | — |  |  | $ | 15,027 |  |  | $ | — |  |  | $ | 15,027 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration (2) |  | $ | — |  |  | $ | — |  |  | $ | 817 |  |  | $ | 817 |
Total liabilities |  | $ | — |  |  | $ | — |  |  | $ | 817 |  |  | $ | 817 |
|  | September 30, 2020 |
(In thousands) |  | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |  |  | Total Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents (1) |  | $ | — |  |  | $ | 18,634 |  |  | $ | — |  |  | $ | 18,634 |
Available-for-sale investments (1) |  |  | — |  |  |  | 30,313 |  |  |  | — |  |  |  | 30,313 |
Total assets |  | $ | — |  |  | $ | 48,947 |  |  | $ | — |  |  | $ | 48,947 |
| (1) | Fair value of cash equivalents (money market funds) and available-for-sale investments (commercial paper and corporate bond securities) is based on quoted vendor prices and broker pricing where all significant inputs are observable.
| (2) | Fair value of contingent consideration liabilities was determined based on discounted cash flow analyses that included probability and timing of development and regulatory milestone achievements and a discount rate, which are considered significant unobservable inputs as of the acquisition date and as of September 30, 2021.
Schedule of Contingent Consideration Liabilities Measured at Fair Value | Changes in the contingent consideration liabilities measured at fair value using Level 3 inputs were as follows:
(In thousands) |  |  |  |
Contingent consideration liability at September 30, 2019 |  | $ | 3,200 |
Additions |  |  | — |
Fair value adjustments |  |  | — |
Settlements |  |  | (3,200 | )
Interest accretion |  |  | — |
Foreign currency translation |  |  | — |
Contingent consideration liability at September 30, 2020 |  |  | — |
Additions |  |  | 814 |
Fair value adjustments |  |  | — |
Settlements |  |  | — |
Interest accretion |  |  | 3 |
Foreign currency translation |  |  | — |
Contingent consideration liability at September 30, 2021 |  | $ | 817 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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