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Fair Value Measurements (Tables) | 6 Months Ended
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Jan. 31, 2020
Fair Value Disclosures [Abstract] |
Schedule of balance of assets measured at fair value on a recurring basis |
|  | Level 1 (1) |  |  | Level 2 (2) |  |  | Level 3 (3) |  |  | Total |
|  | (in thousands) |
January 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  | $ | — |  |  | $ | 8,750 |  |  | $ | — |  |  | $ | 8,750 |
Equity investments included in current assets |  |  | 5,890 |  |  |  | — |  |  |  | — |  |  |  | 5,890 |
Equity investments included in noncurrent assets |  |  | — |  |  |  | — |  |  |  | 4,045 |  |  |  | 4,045 |
Total |  | $ | 5,890 |  |  | $ | 8,750 |  |  | $ | 4,045 |  |  | $ | 18,685 |
July 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt securities |  | $ | — |  |  | $ | 2,534 |  |  | $ | — |  |  | $ | 2,534 |
Equity investments included in current assets |  |  | 5,688 |  |  |  | — |  |  |  | — |  |  |  | 5,688 |
Equity investments included in noncurrent assets |  |  | — |  |  |  | — |  |  |  | 3,619 |  |  |  | 3,619 |
Total |  | $ | 5,688 |  |  | $ | 2,534 |  |  | $ | 3,619 |  |  | $ | 11,841 |
| (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
Schedule of assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) |
|  | Three Months Ended January 31, |  |  | Six Months Ended January 31, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
|  | (in thousands) |
Balance, beginning of period |  | $ | 3,637 |  |  | $ | 2,816 |  |  | $ | 3,619 |  |  | $ | — |
Transfer into Level 3 from adoption of change in accounting for equity investments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2,794 |
Total gains (losses) recognized in "Other income (expense), net" |  |  | 408 |  |  |  | (71 | ) |  |  | 426 |  |  |  | (49 | )
Balance, end of period |  | $ | 4,045 |  |  | $ | 2,745 |  |  | $ | 4,045 |  |  | $ | 2,745 |
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period |  | $ | 408 |  |  | $ | (71 | ) |  | $ | 426 |  |  | $ | (49 | )

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19279-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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