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Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2025

Fair Value Disclosures [Abstract]

Schedule Of Financial Assets Measured At Fair Value on A Recurring Basis

The Company's financial assets measured at fair value on a recurring basis subject to the disclosure requirements at September 30, 2025 and 2024, were as follows (in thousands):

																		Gross Unrealized																		Classification on Balance Sheet
As of September 30, 2025						Fair Value Level						Cost or Amortized Cost						Gains						Losses						Aggregate Fair Value						Cash and Cash Equivalents						Short-Term Investments						Long-Term Investments
Changes in fair value recorded in other comprehensive income (loss):
Money market funds						Level 1						$	642,997					$	—					$	—					$	642,997					$	642,997					$	—					$	—
Total cash equivalents												$	642,997					$	—					$	—					$	642,997					$	642,997					$	—					$	—
Changes in fair value recorded in other net income (expense):
Equity investments						*																								$	15,693					$	—					$	—					$	15,693
Total equity investments																														15,693						—						—						15,693
Total																														$	658,690					$	642,997					$	—					$	15,693

* Equity investments presented in the table above include investments without readily determinable fair values that are measured at fair value using net asset value ("NAV") as a practical expedient, or are measured at cost with adjustments for observable changes in price or impairments. The equity investments are not classified within the fair value hierarchy.

																		Gross Unrealized																		Classification on Balance Sheet
As of September 30, 2024						Fair Value Level						Cost or Amortized Cost						Gains						Losses						Aggregate Fair Value						Cash and Cash Equivalents						Short-Term Investments						Long-Term Investments
Changes in fair value recorded in other comprehensive income (loss):
Money market funds						Level 1						$	437,273					$	—					$	—					$	437,273					$	437,273					$	—					$	—
Total cash equivalents												$	437,273					$	—					$	—					$	437,273					$	437,273					$	—					$	—
Changes in fair value recorded in other net income (expense):
Equity investments						**																								$	8,580					$	—					$	—					$	8,580
Total equity investments																														8,580						—						—						8,580
Total																														$	445,853					$	437,273					$	—					$	8,580

** The fair value of this equity investment is measured at NAV which approximates fair value and is not classified within the fair value hierarchy.

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- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class 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/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- References

No definition available.

+ Details

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