CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Nov. 30, 2021	Aug. 31, 2021
Condensed Consolidated Balance Sheets [Abstract]
Trade and other accounts receivable, less allowance for doubtful accounts	$ 451	$ 463
Common stock, shares authorized	36,000,000	36,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	19,886,937	19,856,865
Common stock, shares outstanding	13,707,038	13,708,966
Treasury stock, shares	6,179,899	6,147,899