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Note 11 - Supplementary Balance Sheet Information (Tables)

12 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

		September 30,
		2025				2024
Accounts receivable		$	146,830			$	159,521
Less allowance for expected credit losses			(4,649	)			(5,349	)
Accounts receivable, net		$	142,181			$	154,172

Accounts Receivable, Allowance for Credit Loss [Table Text Block]

		Year Ended September 30,
		2025				2024				2023
Balance at beginning of period		$	5,349			$	7,745			$	5,162
Provisions			3,745				7,250				8,849
Payments received			(3,872	)			(8,352	)			(6,196	)
Write-offs and adjustments			(573	)			(1,294	)			(70	)
Balance at end of period		$	4,649			$	5,349			$	7,745

Schedule of Inventory, Current [Table Text Block]

		September 30,
		2025				2024
Raw materials and purchased parts		$	33,319			$	27,461
Work-in-process			5,050				7,739
Finished goods			36,587				36,120
Total inventories		$	74,956			$	71,320

		Year Ended September 30,
		2025				2024				2023
Balance at beginning of period		$	6,067			$	4,732			$	4,082
Provisions			5,421				4,018				1,844
Inventory disposals and adjustments			(5,620	)			(2,683	)			(1,194	)
Balance at end of period		$	5,868			$	6,067			$	4,732

Summary of Valuation Allowance [Table Text Block]

		Year Ended September 30,
		2025				2024				2023
Balance at beginning of period		$	44,222			$	7,214			$	5,927
Charge to income tax provision (benefit)			36,475				31,793				(7	)
Charged to other accounts			21,324				5,215				1,294
Balance at end of period		$	102,021			$	44,222			$	7,214

Schedule of Product Warranty Liability [Table Text Block]

		Year Ended September 30,
		2025				2024				2023
Balance at beginning of period		$	5,213			$	3,974			$	2,890
Accruals for warranties during the year			927				2,741				2,564
Costs incurred during the year			(1,427	)			(1,502	)			(1,480	)
Balance at end of period		$	4,713			$	5,213			$	3,974

X

- Definition

Tabular disclosure of allowance for credit loss on accounts receivable.

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