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Equity Investments (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jun. 30, 2016
August 1, 2018 [Member] |  |  |
Equity Investments (Textual) |  |  |
Cumulative effect of adopting this ASU increase in equity investments | $ 1,200 |  |
Accumulated other comprehensive loss [Member] | August 1, 2018 [Member] |  |  |
Equity Investments (Textual) |  |  |
Cumulative effect of adopting this ASU increase in equity investments | 33 |  |
Accumulated deficit [Member] | August 1, 2018 [Member] |  |  |
Equity Investments (Textual) |  |  |
Cumulative effect of adopting this ASU increase in equity investments | $ 1,100 |  |
Common Class B [Member] | Zedge Inc [Member] |  |  |
Equity Investments (Textual) |  |  |
Shares of common stock | 42,282 | 42,282 |
Common Class B [Member] | Rafael Holdings Inc [Member] |  |  |
Equity Investments (Textual) |  |  |
Shares of common stock | 27,419 | 25,803 |
Visa Series C Preferred [Member] |  |  |
Equity Investments (Textual) |  |  |
Owned shares | 1,830 |  | 1,830
Shares owned fair value | $ 800 |  |
Convertible shares |  |  | 13.886

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