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Fair Value Measurements (Details) - USD ($) $ in Thousands | Apr. 30, 2020 | Jul. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities |  | $ 12,948 | $ 2,534
Equity investments included in current assets |  | 5,716 | 5,688
Equity investments included in noncurrent assets |  | 3,633 | 3,619
Total |  | 22,297 | 11,841
Contingent consideration included in other noncurrent liabilities (see Note 8) |  | 365 |
Fair Value Measurements, Recurring basis [Member] | Level 1 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities | [1] |  |
Equity investments included in current assets | [1] | 5,716 | 5,688
Equity investments included in noncurrent assets | [1] |  |
Total | [1] | 5,716 | 5,688
Contingent consideration included in other noncurrent liabilities (see Note 8) | [1] |  |
Fair Value Measurements, Recurring basis [Member] | Level 2 [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Debt securities | [2] | 12,948 | 2,534
Equity investments included in current assets | [2] |  |
Equity investments included in noncurrent assets | [2] |  |
Total | [2] | 12,948 | 2,534
Contingent consideration included in other noncurrent liabilities (see Note 8) | [2] |  |
Fair Value Measurements, Recurring basis [Member] | Level 3 [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] | 3,633 | 3,619
Total | [3] | 3,633 | $ 3,619
Contingent consideration included in other noncurrent liabilities (see Note 8) | [3] | $ 365 |
[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

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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