Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands	Feb. 29, 2024	Aug. 31, 2023	Feb. 28, 2023
Debt Instrument [Line Items]
Total debt	$ 115,598	$ 115,710	$ 115,822
Less current portion	(228)	(226)	(224)
Less unamortized debt issuance costs	(295)	(320)	(345)
Total long-term debt	115,075	115,164	115,253
Elecsys Series 2006A Bonds [Member]
Debt Instrument [Line Items]
Total debt	598	710	822
Series A Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	$ 115,000	$ 115,000	$ 115,000