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Note 13 - Capital Stock - Summary of Outstanding Unvested RSUs (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) | 9 Months Ended |
--- | --- | ---
Apr. 30, 2022 | Jul. 31, 2021
Number of Restricted Stock Units (in shares) | 997,612 | 997,612
Grant Date Fair Value (in dollars per share) | $ 1.42 |
Remaining Life (Year) | 1 year 5 months 23 days |
Aggregate Intrinsic Value | $ 4,239,851 |
July 30, 2019 [Member] |  |
Number of Restricted Stock Units (in shares) | 154,999 |
Grant Date Fair Value (in dollars per share) | $ 0.94 |
Remaining Life (Year) | 3 months |
Aggregate Intrinsic Value | $ 658,746 |
July 16, 2020 [Member] |  |
Number of Restricted Stock Units (in shares) | 434,996 |
Grant Date Fair Value (in dollars per share) | $ 0.91 |
Remaining Life (Year) | 1 year 2 months 15 days |
Aggregate Intrinsic Value | $ 1,848,733 |
July 21, 2021 [Member] |  |
Number of Restricted Stock Units (in shares) | 407,617 |
Grant Date Fair Value (in dollars per share) | $ 2.15 |
Remaining Life (Year) | 2 years 2 months 23 days |
Aggregate Intrinsic Value | $ 1,732,372 |

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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References No definition available. + Details
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