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Equity Investments (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2020 | Apr. 30, 2019 | Jul. 31, 2019 | Jun. 30, 2016
Equity Investments (Textual) |  |  |  |  |  |
Shares owned fair value | $ (412) | $ 599 | $ 14 | $ 550 |  |
Common Stock Class B [Member] | Zedge Inc [Member] |  |  |  |  |  |
Equity Investments (Textual) |  |  |  |  |  |
Shares of common stock |  |  | 42,282 |  | 42,282 |
Common Stock Class B [Member] | Rafael Holdings Inc [Member] |  |  |  |  |  |
Equity Investments (Textual) |  |  |  |  |  |
Shares of common stock |  |  | 27,419 |  | 27,419 |
Visa Series C Preferred [Member] |  |  |  |  |  |
Equity Investments (Textual) |  |  |  |  |  |
Owned shares | 1,830 | 1,830 | 1,830 | 1,830 |  | 1,830
Shares owned fair value | $ (400) | $ 600 | $ 14 | $ 600 |  |
Convertible shares |  |  |  |  |  | 13.884

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