Note 9 - Stockholders' Equity (Tables)

9 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

				Unrealized
				Gains (Losses)
				on Available-			​Gains (Losses)			Pension
	Currency			for-Sale			on Derivative			Liability
	Translation			Securities			asset			Adjustments
	Adjustments			Net of tax			Net of tax			Net of tax			Total
Balance at September 30, 2022	$	(165,694	)	$	(10,909	)	$	93,020		$	(333	)	$	(83,916	)
Other comprehensive income (loss) before reclassifications		113,140			4,109			(70,478	)		—			46,771
Balance at June 30, 2023	$	(52,554	)	$	(6,800	)	$	22,542		$	(333	)	$	(37,145	)

				Unrealized
				Gains (Losses)
				on Available-			​Gains (Losses)			Pension
	Currency			for-Sale			on Derivative			Liability
	Translation			Securities			asset			Adjustments
	Adjustments			Net of tax			Net of tax			Net of tax			Total
Balance at September 30, 2023	$	(88,448	)	$	(5,135	)	$	31,487		$	(330	)	$	(62,426	)
Other comprehensive income (loss) before reclassifications		21,725			3,799			(7,971	)		(88	)		17,465
Amounts reclassified from accumulated other comprehensive income (loss)		—			—			—			66			66
Balance at June 30, 2024	$	(66,723	)	$	(1,336	)	$	23,516		$	(352	)	$	(44,895	)