Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Nov. 30, 2024	Aug. 31, 2024	Nov. 30, 2023
Debt Instrument [Line Items]
Total debt	$ 115,434	$ 115,492	$ 115,654
Less current portion	(229)	(228)	(227)
Less unamortized debt issuance costs	(257)	(270)	(307)
Total long-term debt	114,948	114,994	115,120
Elecsys Series 2006A Bonds [Member]
Debt Instrument [Line Items]
Total debt	434	492	654
Series A Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	$ 115,000	$ 115,000	$ 115,000