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Investment in RP Finance, LLC (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2021 | Jul. 31, 2022 | Jul. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Nov. 30, 2020 | Aug. 31, 2020 | Feb. 03, 2020
Investment in RP Finance, LLC (Details) [Line Items] |  |  |  |  |  |  |  |
Amount of revolving commitment to funds |  |  | $ 10,000 | $ 5,000 | $ 10,000 | $ 5,000 | $ 5,000 |
Income from interest |  | $ 383 |  |  |  |  |  |
Cumulative funds description |  | As of July 31, 2022, the Company has funded a cumulative total of $9.375 million in accordance with its 37.5% ownership interests in RP Finance. |  |  |  |  |  |
Reserve on related party interest receivable of Interest income, net |  | $ 1,900 |  |  |  |  |  |
Rafael Pharmaceuticals [Member] |  |  |  |  |  |  |  |
Investment in RP Finance, LLC (Details) [Line Items] |  |  |  |  |  |  |  |
Amount of revolving commitment to funds |  |  |  | $ 5,000 |  | $ 5,000 | $ 5,000 |
Percentage of issued and outstanding shares |  | 12.00% |  |  |  |  |  |
Related party receivable |  | $ 9,375 |  |  |  |  |  |
RP Finance [Member] |  |  |  |  |  |  |  |
Investment in RP Finance, LLC (Details) [Line Items] |  |  |  |  |  |  |  |
Income from interest |  | $ 575 |  |  |  |  |  |
Percentage of ownership interest |  | 37.50% | 37.50% |  |  |  |  |
Equity loss | $ 575 |  |  |  |  |  |  |
Equity method investment |  | $ 0 |  |  |  |  |  |
Line of Credit Agreement [Member] |  |  |  |  |  |  |  |
Investment in RP Finance, LLC (Details) [Line Items] |  |  |  |  |  |  |  |
Amount of revolving commitment to funds |  |  |  |  |  |  |  | $ 50,000,000
Description line of credit facility |  | The Company owns 37.5% of the equity interests in RP Finance and is required to fund 37.5% of funding requests from Cornerstone Pharmaceuticals under the RPF Line of Credit. Howard Jonas owns 37.5% of the equity interests in RP Finance, and is required to fund 37.5% of funding requests from Cornerstone Pharmaceuticals under the RPF Line of Credit. The remaining 25% equity interests in RP Finance are owned by other shareholders of Cornerstone Pharmaceuticals. |  |  |  |  |  |

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