Credit Arrangements (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Aug. 31, 2025	Aug. 31, 2024
Debt Instrument [Line Items]
Total debt	$ 115,263	$ 115,492
Less current portion	(233)	(228)
Less debt issuance costs	(220)	(270)
Total long-term debt	114,810	114,994
Elecsys Series 2006A Bonds [Member]
Debt Instrument [Line Items]
Total debt	263	492
Series A Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	$ 115,000	$ 115,000