Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jul. 31, 2023	Jul. 31, 2022
Allowance for doubtful accounts (in Dollars)	$ 245	$ 197
Class A Common Stock
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	787,163	787,163
Common stock, shares outstanding	787,163	787,163
Class B Common Stock
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	23,635,709	23,712,449
Common stock, shares outstanding	23,490,527	23,687,964