CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Consolidated Balance Sheets [Abstract]
Trade and other accounts receivable, less allowance for doubtful accounts	$ 362	$ 300
Common stock, shares authorized	36,000,000	36,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	19,812,685	19,773,977
Common stock, shares outstanding	13,664,786	13,718,661
Treasury stock, shares	6,147,899	6,055,316