CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Nov. 30, 2019	Aug. 31, 2019
CONSOLIDATED BALANCE SHEETS [Abstract]
Receivables, net of allowance for doubtful accounts	$ 125	$ 144
Prepaid expenses and other current assets, fair value of derivative instruments	2,747	2,736
Other non-current assets, fair value of derivative instruments	436	0
Other non-current assets, fair value of foreign currency forward contracts	127	0
Other long-term liabilities, fair value of derivative instruments	3,259	2,910
Other long-term liabilities, post-employment plans	$ 5,675	$ 5,421
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	31,474,818	31,461,359
Common stock, shares outstanding	30,612,511	30,538,788
Treasury stock, shares	862,307	924,332