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EARNINGS PER SHARE - Additional Information (Details) - $ / shares | 6 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2021 | Oct. 31, 2020
Board Of Director Authorized |  |
Class of Stock [Line Items] |  |
Number of shares authorized to be purchased (shares) | 4,703,487 |
Stock Repurchase Committee Authorized |  |
Class of Stock [Line Items] |  |
Repurchase of common stock (shares) | 0 | 0
Class A Common Stock |  |
Class of Stock [Line Items] |  |
Dividend proportions (usd per share) | $ 0.01 |
Percentage of shares outstanding used in two class method calculation | 40.00% |
Class B Common Stock |  |
Class of Stock [Line Items] |  |
Dividend proportions (usd per share) | $ 0.015 |
Percentage of shares outstanding used in two class method calculation | 60.00% |

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