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Equity Investments (Details Textual) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Oct. 31, 2018 | Jul. 31, 2018
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 | 33,000 |
Accumulated deficit [Member] | August 1, 2018 [Member] |  |
Equity Investments (Textual) |  |
Cumulative effect of adopting this ASU increase in equity investments | $ 1,100 |
Visa Series C Convertible Participating Preferred Stock [Member] |  |
Equity Investments (Textual) |  |
Owned shares | 1,830 |
Shares owned fair value | $ 22,000 |
Convertible shares | 13.952 |
Zedge [Member] | Class B common stock [Member] |  |
Equity Investments (Textual) |  |
Owned shares | 42,282 | 42,282
Shares owned fair value | $ 100 | $ 100
Rafael [Member] | Class B common stock [Member] |  |
Equity Investments (Textual) |  |
Owned shares | 25,803 | 25,803
Shares owned fair value | $ 200 | $ 200

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