Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2020	Aug. 31, 2019
Consolidated Balance Sheets
Convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares outstanding	36,000	36,000
Convertible preferred stock, liquidation value (in dollars)	$ 900	$ 900
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	8,000,000	8,000,000
Common stock, shares outstanding	4,861,590	4,861,590