Fair Value Measurements (Details) - Schedule of balance of assets measured at fair value on a recurring basis - Fair Value Measurements, Recurring basis [Member] - USD ($) $ in Thousands		Oct. 31, 2020	Jul. 31, 2020
Fair Value Measurements (Details) - Schedule of balance of assets measured at fair value on a recurring basis [Line Items]
Debt securities		$ 23,890	$ 18,363
Equity investments included in current assets		21,036	5,964
Equity investments included in noncurrent assets		4,096	3,825
Total		49,022	28,152
Contingent consideration included in other noncurrent liabilities		(391)	(396)
Level 1 [Member]
Fair Value Measurements (Details) - Schedule of balance of assets measured at fair value on a recurring basis [Line Items]
Debt securities	[1]	4,171	2,498
Equity investments included in current assets	[1]	21,036	5,964
Equity investments included in noncurrent assets	[1]
Total	[1]	25,207	8,462
Contingent consideration included in other noncurrent liabilities	[1]
Level 2 [Member]
Fair Value Measurements (Details) - Schedule of balance of assets measured at fair value on a recurring basis [Line Items]
Debt securities	[2]	19,719	15,865
Equity investments included in current assets	[2]
Equity investments included in noncurrent assets	[2]	2,271
Total	[2]	21,990	15,865
Contingent consideration included in other noncurrent liabilities	[2]
Level 3 [Member]
Fair Value Measurements (Details) - Schedule of balance of assets measured at fair value on a recurring basis [Line Items]
Debt securities	[3]
Equity investments included in current assets	[3]
Equity investments included in noncurrent assets	[3]	1,825	3,825
Total	[3]	1,825	3,825
Contingent consideration included in other noncurrent liabilities	[3]	$ (391)	$ (396)

[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