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Schedule of Balance of Assets Measured at Fair Value On a Recurring Basis (Details) - USD ($)
$ in Thousands
Jul. 31, 2021
Jul. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities $ 14,012 $ 18,363
Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities 14,012 18,363
Equity investments included in current assets 42,434 5,964
Equity investments included in noncurrent assets 2,465 3,825
Total 58,911 28,152
Contingent consideration included in other current liabilities (628)  
Contingent consideration included in other noncurrent liabilities (397) (396)
Contingent consideration included in other liabilities (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 1,652 2,498
Equity investments included in current assets 40,225 5,964
Equity investments included in noncurrent assets
Total 41,877 8,462
Contingent consideration included in other current liabilities  
Contingent consideration included in other noncurrent liabilities
Contingent consideration included in other liabilities  
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 12,360 15,865
Equity investments included in current assets 2,209
Equity investments included in noncurrent assets
Total 14,569 15,865
Contingent consideration included in other current liabilities  
Contingent consideration included in other noncurrent liabilities
Contingent consideration included in other liabilities  
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
Equity investments included in current assets
Equity investments included in noncurrent assets 2,465 3,825
Total 2,465 3,825
Contingent consideration included in other current liabilities (628)  
Contingent consideration included in other noncurrent liabilities (397) $ (396)
Contingent consideration included in other liabilities $ (1,025)