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Note 12 - Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2025

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

​		As of March 31, 2025
Description		Total Fair Value				Level 1				Level 2				Level 3
Assets:
Cash equivalents		$	120,491			$	119,989			$	502			$	—
Available-for-sale securities			251,478				23,743				227,735				—
Investment in equity securities			2,100				—				—				2,100
Total assets		$	374,069			$	143,732			$	228,237			$	2,100
Liabilities:
Net investment hedge			10,500				—				10,500				—
Foreign exchange contracts			340				—				340				—
Total liabilities		$	10,840			$	—			$	10,840			$	—

​		As of September 30, 2024
Description		Total Fair Value				Level 1				Level 2				Level 3
Assets:
Cash equivalents		$	157,990			$	157,990			$	—			$	—
Available-for-sale securities			198,616				37,584				161,032				—
Convertible debt securities			2,000				—				—				2,000
Foreign exchange contracts			9				—				9				—
Total assets		$	358,615			$	195,574			$	161,041			$	2,000
Liabilities:
Net investment hedge			1,915				—				1,915				—
Foreign exchange contracts			213			$	—			$	213			$	—
Total liabilities		$	2,128			$	—			$	2,128			$	—

X

- 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/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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Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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