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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Note 2 - Acquisitions (Details Textual) - USD ($) $ in Thousands			3 Months Ended		12 Months Ended
	Feb. 05, 2025	Oct. 28, 2024	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025
Goodwill			$ 599,923		$ 610,338
Business Combination, Acquisition-Related Cost, Expense			433	$ 1,840
McStarlite [Member]
Business Combination, Voting Equity Interest Acquired, Percentage	100.00%
Business Combination, Consideration Transferred	$ 57,000		56,963		56,963
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	24,500		24,500		24,500
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived	19,700
Goodwill	16,200		16,207		16,761
Payments to Acquire Businesses, Gross			$ 57,549		$ 57,549
McStarlite [Member] \| Trade Names [Member]
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived	$ 4,800
McStarlite [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	12 years
Amran Instrument Transformers [Member]
Business Combination, Voting Equity Interest Acquired, Percentage		100.00%
Business Combination, Consideration Transferred		$ 179,700
Payments to Acquire Businesses, Gross		$ 153,700
Amran Instrument Transformers [Member] \| Common Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		152,299
Amran Instrument Transformers [Member] \| Treasury Stock, Common [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		26
Narayan Powertech Pvt. Ltd. [Member]
Business Combination, Voting Equity Interest Acquired, Percentage		90.10%
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill		$ 136,000
Goodwill		298,400
Payments to Acquire Businesses, Gross		$ 261,900
Business Combination, Period for Right to Transfer Remaining Interest (Year)		3 years
Business Combination, Period for Right to Acquire Remaining Interest (Year)		3 years
Pro Forma Information, Interest Rate Assumption			7.70%
Pro Forma Information, Tax Rate Assumed			22.60%
Narayan Powertech Pvt. Ltd. [Member] \| Mold-Tech Singapore [Member] \| Scenario, Plan [Member]
Business Combination, Voting Equity Interest Acquired, Percentage		9.90%
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 26,700
Narayan Powertech Pvt. Ltd. [Member] \| Trade Names [Member]
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Indefinite-Lived		28,700
Narayan Powertech Pvt. Ltd. [Member] \| Customer Relationships [Member]
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived		$ 107,300
Finite-Lived Intangible Asset, Useful Life (Year)		12 years