CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	May 31, 2022	Aug. 31, 2021
Condensed Consolidated Balance Sheets [Abstract]
Trade and other accounts receivable, less allowance for doubtful accounts	$ 329	$ 463
Common stock, shares authorized	36,000,000	36,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares issued	19,887,577	19,856,865
Common stock, shares outstanding	13,637,841	13,708,966
Treasury stock, shares	6,249,736	6,147,899