Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2020	Jul. 31, 2019
Allowance for doubtful accounts	$ 170	$ 122
Convertible debt, net of discount	$ 0	$ 54
Class A common stock
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	787,163	787,163
Common stock, shares outstanding	787,163	787,163
Class B common stock
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	15,020,485	13,142,502
Common stock, shares outstanding	15,020,485	13,142,502