Fair Value Measurements - Carrying Amounts and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Aug. 31, 2016	Aug. 31, 2015
Carrying Amount
Financial assets:
Cash and cash equivalents	$ 6,030	$ 4,808
Receivables (including related parties)	900	2,049
Other assets (non-derivatives)	643	872
Financial liabilities:
Payables (including related parties)	4,552	5,214
Long-term debt (including current installments)	2,909	3,907
Fair Value
Financial assets:
Cash and cash equivalents	6,030	4,808
Receivables (including related parties)	900	2,049
Other assets (non-derivatives)	643	872
Financial liabilities:
Payables (including related parties)	4,552	5,214
Long-term debt (including current installments)	$ 2,889	$ 3,906