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Schedule of Carrying Value of Equity Investments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2021 | Apr. 30, 2020
Schedule Of Carrying Value Of Equity Investments |  |  |  |
Balance, beginning of period | $ 2,223 | $ 4,345 | $ 4,109 | $ 3,919
Redemption for Visa mandatory release assessment |  |  | (1,870) |
Adjustment for observable transactions involving a similar investment from the same issuer | 404 | (412) | 388 | 14
Redemptions | (6) |  | (6) |
Impairments |  |  |  |
Balance, end of the period | $ 2,621 | $ 3,933 | $ 2,621 | $ 3,933

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- Definition Amount of investment in equity security without readily determinable fair value. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120269885&loc=SL75117539-209714 + Details
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