Note 5 - Derivative Instruments - Schedule of Derivative Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Cross Currency Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member]
Notional amount	$ 75,978	$ 436,360
Foreign Exchange Contract [Member] \| Not Designated as Hedging Instrument [Member]
Notional amount	$ 61,866	$ 184,800

Nominal or face amount used to calculate payment on derivative.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant