CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	May 31, 2021	Aug. 31, 2020
CONSOLIDATED BALANCE SHEETS [Abstract]
Receivables, allowance for doubtful accounts	$ 166	$ 147
Other non-current assets, fair value of derivative instruments	1,160	872
Other long-term liabilities, fair value of derivative instruments	3,154	4,685
Other long-term liabilities, post-employment plans	$ 6,665	$ 6,155
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	31,456,121	31,417,576
Common stock, shares outstanding	30,777,829	30,670,712
Treasury stock, shares	678,292	746,864