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Equity (Details) - USD ($) |  |  | 1 Months Ended | 2 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 02, 2018 | Apr. 16, 2018 | Dec. 21, 2018 | May 31, 2018 | Oct. 12, 2020 | Jul. 31, 2020 | Jul. 31, 2019
Equity (Details) [Line Items] |  |  |  |  |  |  |
Aggregate purchase price (in Dollars) |  |  |  |  |  |  | $ 13,272,000
Noncontrolling Interest [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Accumulated deficit (in Dollars) | $ 2,000,000.0 |  |  |  |  |  |
Stock Repurchases [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Shares remained available for repurchase under the stock repurchase program |  |  |  |  | 5,800,000 |  |
Common Class B [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Aggregate repurchased shares |  |  |  |  |  | 8,000,000.0 |
Shares remained available for repurchase under the stock repurchase program |  |  |  |  |  | 6,200,000 |
Common Class B [Member] | Howard S. Jonas [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Treasury shares of common stock sold |  |  | 2,546,689 |  |  |  |
Aggregate consideration for sale of treasury shares (in Dollars) |  |  | $ 14,800,000 |  |  |  |
Closing price of Class B common stock (in Dollars per share) |  |  | $ 5.89 |  |  |  |
Aggregate purchase price (in Dollars) |  |  |  | $ 1,500,000 |  |  |
Purchase price reduced (in Dollars) |  | $ 200,000 |  |  |  |  |
Agreed to purchase shares of common stock |  | 2,546,689 |  |  |  |  |
Common Class B [Member] | Employee [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Class B common stock shares repurchased |  |  |  |  |  | 37,348 | 3,748
Aggregate purchase price of shares repurchased (in Dollars) |  |  |  |  |  | $ 300,000 | $ 28,000
Common Class B [Member] | Stock Repurchases [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Class B common stock shares repurchased |  |  |  |  |  | 671,117 | 729,110
Aggregate purchase price of shares repurchased (in Dollars) |  |  |  |  |  | $ 4,200,000 | $ 3,900,000
Common Class B [Member] | Stock Repurchases [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Class B common stock shares repurchased |  |  |  |  | 463,792 |  |
Aggregate purchase price of shares repurchased (in Dollars) |  |  |  |  | $ 2,800,000 |  |
Common Class B [Member] | Stock Repurchases [Member] | Fiscal 2021 [Member] |  |  |  |  |  |  |
Equity (Details) [Line Items] |  |  |  |  |  |  |
Class B common stock shares repurchased |  |  |  |  |  | 1 |

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