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Long-Term Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Thousands | Nov. 30, 2022 | Aug. 31, 2022 | Nov. 30, 2021
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total debt | $ 115,876 | $ 115,931 | $ 116,096
Less current portion | (223) | (222) | (219)
Less unamortized debt issuance costs | (356) | (368) | (406)
Total long-term debt | 115,297 | 115,341 | 115,471
Elecsys Series 2006A Bonds [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | 876 | 931 | 1,096
Series A Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 115,000 | $ 115,000 | $ 115,000

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