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Debt Securities | 9 Months Ended
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Apr. 30, 2020
Investments, Debt and Equity Securities [Abstract] |
Debt Securities | Note 5—Debt Securities The following is a summary of available-for-sale debt securities:
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
April 30, 2020: |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit* |  | $ | 12,864 |  |  | $ | 85 |  |  | $ | (1 | ) |  | $ | 12,948 |
July 31, 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit* |  | $ | 2,234 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,234 |
Municipal bonds |  |  | 300 |  |  |  | — |  |  |  | — |  |  |  | 300 |
Total |  | $ | 2,534 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,534 |
| * | Each of the Company's certificates of deposit has a CUSIP, was purchased in the secondary market through a broker, and may be sold in the secondary market.
Proceeds from maturities and sales of debt securities and redemptions of equity investments were $1.6 million and $0.8 million in the three months ended April 30, 2020 and 2019, respectively, and $4.3 million and $6.3 million in the nine months ended April 30, 2020 and 2019, respectively. There were no realized gains or realized losses from sales of debt securities in the three and nine months ended April 30, 2020 and 2019. The Company uses the specific identification method in computing the realized gains and realized losses on the sales of debt securities. The contractual maturities of the Company's available-for-sale debt securities at April 30, 2020 were as follows:
|  | Fair Value |
|  | (in thousands) |
Within one year |  | $ | 11,728 |
After one year through five years |  |  | 1,220 |
After five years through ten years |  |  | — |
After ten years |  |  | — |
Total |  | $ | 12,948 |
The following available-for-sale debt securities were in an unrealized loss position for which other-than-temporary impairments have not been recognized:
|  | Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
April 30, 2020: |  |  |  |  |  |
Certificates of deposit |  | $ | 1 |  |  | $ | 384 |
July 31, 2019: |  |  |  |  |  |  |  |
Total |  | $ | — |  |  | $ | — |
At April 30, 2020 and July 31, 2019, there were no securities in a continuous unrealized loss position for 12 months or longer.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
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