Equity (Details Narrative) - USD ($) $ in Millions	12 Months Ended
Jul. 31, 2021	Jul. 31, 2020
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	5,800,000
Class B Common Stock [Member]
Aggregate repurchased shares	8,000,000.0
Class B common stock shares repurchased	463,792	671,117
Aggregate purchase price of shares repurchased	$ 2.8	$ 4.2
Class B Common Stock [Member] \| Employees [Member]
Class B common stock shares repurchased	109,381	37,348
Aggregate purchase price of shares repurchased	$ 1.3	$ 0.3

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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