Fair Value Measurements - Carrying Amounts and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Aug. 31, 2022	Aug. 31, 2021
Carrying Amount
Financial assets:
Cash and cash equivalents and restricted cash	$ 4,356	$ 4,923
Receivables (including related parties)	880	865
Other assets (non-derivatives)	184	248
Financial liabilities:
Payables (including related parties)	4,049	4,300
Long-term debt (including current installments)	6,929	7,678
Fair Value
Financial assets:
Cash and cash equivalents and restricted cash	4,356	4,923
Receivables (including related parties)	880	865
Other assets (non-derivatives)	184	248
Financial liabilities:
Payables (including related parties)	4,049	4,300
Long-term debt (including current installments)	$ 6,929	$ 7,678