CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Nov. 30, 2019	Aug. 31, 2019
Condensed Consolidated Balance Sheets [Abstract]
Trade and other accounts receivable, less allowance for doubtful accounts	$ 320	$ 300
Common stock, shares authorized	36,000,000	36,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	19,796,319	19,773,977
Common stock, shares outstanding	13,714,203	13,718,661
Treasury stock, shares	6,082,116	6,055,316