Schedule of Balance of Assets Measured at Fair Value On a Recurring Basis (Details) - USD ($) $ in Thousands		Jan. 31, 2022	Jul. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities		$ 15,490	$ 14,012
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt securities		15,490	14,012
Equity investments included in current assets		28,494	42,434
Equity investments included in noncurrent assets		2,261	2,465
Total		46,245	58,911
Contingent consideration included in other current liabilities		(628)	(628)
Contingent consideration included in other noncurrent liabilities		(75)	(397)
Contingent consideration included in other liabilities		(703)	(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]	1,603	1,652
Equity investments included in current assets	[1]	28,494	40,225
Equity investments included in noncurrent assets	[1]
Total	[1]	30,097	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]	13,887	12,360
Equity investments included in current assets	[2]		2,209
Equity investments included in noncurrent assets	[2]
Total	[2]	13,887	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]	2,261	2,465
Total	[3]	2,261	2,465
Contingent consideration included in other current liabilities	[3]	(628)	(628)
Contingent consideration included in other noncurrent liabilities	[3]	(75)	(397)
Contingent consideration included in other liabilities	[3]	$ (703)	$ (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