CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Nov. 30, 2017	Aug. 31, 2017
Receivables, allowance for doubtful account	$ 6	$ 7
Prepaid expenses and other current assets, fair value of derivative	71	0
Other non-current assets, fair value of derivative instruments	3,278	2,547
Other long-term liabilities, fair value of derivative instruments	346	682
Other long-term liabilities, defined benefit plan	$ 5,335	$ 5,051
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	31,278,595	31,275,727
Common stock, shares outstanding	30,403,610	30,400,742
Treasury stock, shares	874,985	874,985