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Balance Sheet Components (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2022
Jan. 31, 2021
Jul. 31, 2021
Balance Sheet Related Disclosures [Abstract]          
Property and equipment pledged as collateral $ 0   $ 0   $ 0
Depreciation 3,500,000 $ 3,500,000 7,200,000 $ 7,200,000  
Amortization 1,500,000 700,000 2,700,000 1,400,000  
Amortization expense 3,800,000 $ 6,300,000 7,500,000 12,600,000  
New strategic investments $ 10,500,000   $ 10,521,000 $ 2,000,000