Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 28, 2018	Aug. 31, 2017
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 485	$ 815
Common stock, par value (in dollars per share)	$ 0.0000056	$ 0.0000056
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	3,545,000	3,544,000
Common stock, shares outstanding	3,545,000	3,544,000