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Note 8 - Supplementary Balance Sheet Information

9 Months Ended

Jun. 30, 2025

Notes to Financial Statements

Supplemental Balance Sheet Disclosures [Text Block]

8. Supplementary Balance Sheet Information

Inventories

The following is a summary of inventories at June 30, 2025 and  September 30, 2024 (in thousands):

​		June 30,				September 30,
​		2025				2024
​
Raw materials and purchased parts		$	35,796			$	34,134
Work-in-process			6,056				8,402
Finished goods			38,654				36,387
Total inventories		$	80,506			$	78,923

Inventory reserves were $8.5 million and $6.1 million, respectively, at June 30, 2025 and  September 30, 2024.

Warranty and Retrofit Costs

The following is a summary of product and warranty retrofit activity for the nine months ended June 30, 2025 and 2024 (in thousands):

​		Nine Months Ended June 30,
​		2025				2024
​		​				​
Balance at beginning of period		$	5,213			$	3,974
Accruals for warranties during the period			587				1,939
Costs incurred during the period			(427	)			(1,184	)
Balance at end of period		$	5,373			$	4,729

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- Definition

The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/210/tableOfContent

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