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Schedule of Balance of Assets Measured at Fair Value On a Recurring Basis (Details) - USD ($)
$ in Thousands
Oct. 31, 2021
Jul. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities $ 13,633 $ 14,012
Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities 13,633 14,012
Equity investments included in current assets 31,144 42,434
Equity investments included in noncurrent assets 2,119 2,465
Total 46,896 58,911
Contingent consideration included in other current liabilities (628) (628)
Contingent consideration included in other noncurrent liabilities (387) (397)
Contingent consideration included in other liabilities (1,015) (1,025)
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities [1] 1,627 1,652
Equity investments included in current assets [1] 31,144 40,225
Equity investments included in noncurrent assets [1]
Total [1] 32,771 41,877
Contingent consideration included in other current liabilities [1]
Contingent consideration included in other noncurrent liabilities [1]
Contingent consideration included in other liabilities [1]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities [2] 12,006 12,360
Equity investments included in current assets [2] 2,209
Equity investments included in noncurrent assets [2]
Total [2] 12,006 14,569
Contingent consideration included in other current liabilities [2]
Contingent consideration included in other noncurrent liabilities [2]
Contingent consideration included in other liabilities [2]
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities [3]
Equity investments included in current assets [3]
Equity investments included in noncurrent assets [3] 2,119 2,465
Total [3] 2,119 2,465
Contingent consideration included in other current liabilities [3] (628) (628)
Contingent consideration included in other noncurrent liabilities [3] (387) (397)
Contingent consideration included in other liabilities [3] $ (1,015) $ (1,025)
[1] quoted prices in active markets for identical assets or liabilities
[2] observable inputs other than quoted prices in active markets for identical assets and liabilities
[3] no observable pricing inputs in the market