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Equity Investments (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Jul. 31, 2020 | Jul. 31, 2019 | Sep. 24, 2020 | Jun. 30, 2016
Equity Investments (Details) [Line Items] |  |  |  |
Preferred share value | $ 8,833,000 | $ 9,319,000 |  |
Carrying value of shares | 206,000 | 826,000 |  |
August 1, 2018 [Member] |  |  |  |
Equity Investments (Details) [Line Items] |  |  |  |
Equity investment | 1,200,000 |  |  |
AOCI Attributable to Parent [Member] | August 1, 2018 [Member] |  |  |  |
Equity Investments (Details) [Line Items] |  |  |  |
Equity investment | 33,000 |  |  |
Accumulated deficit [Member] | August 1, 2018 [Member] |  |  |  |
Equity Investments (Details) [Line Items] |  |  |  |
Equity investment | $ 1,100,000 |  |  |
Visa Series C Convertible Participating Preferred Stock [Member] |  |  |  |
Equity Investments (Details) [Line Items] |  |  |  |
Owned shares |  |  | 1,830 | 1,830
Convertible shares | 13.722 |  |  |
Carrying value of shares | $ 200,000 | $ 800,000 |  |
Visa Series A Convertible Participating Preferred Stock [Member] | Subsequent Event [Member] |  |  |  |
Equity Investments (Details) [Line Items] |  |  |  |
Owned shares |  |  | 125 |
Convertible shares |  |  | 6.861 |
Preferred share value |  |  | $ 4,400,000 |
Visa Series A Convertible Participating Preferred Stock [Member] | Visa Class A Common Stock [Member] | Subsequent Event [Member] |  |  |  |
Equity Investments (Details) [Line Items] |  |  |  |
Owned shares |  |  | 12,500 |

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