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Fair Value Measurements (Details) - Schedule of fair value on a recurring basis and where they are classified within the fair value hierarchy - USD ($)
$ in Thousands
Jan. 31, 2022
Jul. 31, 2021
Fair Value Measurements (Details) - Schedule of fair value on a recurring basis and where they are classified within the fair value hierarchy [Line Items]    
Hedge funds $ 5,025 $ 5,268
Total 5,025 5,268
Level 1 [Member]    
Fair Value Measurements (Details) - Schedule of fair value on a recurring basis and where they are classified within the fair value hierarchy [Line Items]    
Hedge funds
Total
Level 2 [Member]    
Fair Value Measurements (Details) - Schedule of fair value on a recurring basis and where they are classified within the fair value hierarchy [Line Items]    
Hedge funds
Total
Level 3 [Member]    
Fair Value Measurements (Details) - Schedule of fair value on a recurring basis and where they are classified within the fair value hierarchy [Line Items]    
Hedge funds 5,025 5,268
Total $ 5,025 $ 5,268