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Note 13 - Capital Stock - Schedule of Outstanding Stock Options (Details) - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2022 | Jan. 31, 2022 | Oct. 31, 2021 | Apr. 30, 2021 | Apr. 30, 2022 | Apr. 30, 2021
Balance, number of stock options (in shares) | 9,063,956 | 9,323,790 | 10,404,333 |  | 10,404,333 |
Balance, Weighted Average Exercise Price (in dollars per share) | $ 1.20 | $ 1.20 | $ 1.21 |  | $ 1.21 |
Granted, number of stock options (in shares) |  |  | 10,000 |  |  |
Granted, Weighted Average Exercise Price (in dollars per share) |  |  | $ 2.89 |  |  |
Exercised, number of stock options (in shares) | (1,182,605) | (244,834) | (1,030,543) | (1,942,848) | (2,457,982) | (3,072,130)
Exercised Options, Weighted Average Exercise Price (in dollars per share) | $ 1.15 | $ 1.27 | $ 1.18 |  |  |
Expired, number of stock options (in shares) |  | (15,000) | (60,000) |  |  |
Expired, Weighted Average Exercise Price (in dollars per share) |  | $ 1.36 | $ 2.78 |  |  |
Balance, number of stock options (in shares) | 7,881,351 | 9,063,956 | 9,323,790 |  | 7,881,351 |
Balance, Weighted Average Exercise Price (in dollars per share) | $ 1.21 | $ 1.20 | $ 1.20 |  | $ 1.21 |

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- Definition Number of share options (or share units) exercised during the current period. + References No definition available. + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + 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)(1)(iv)(04) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + 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)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested 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)(1)(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)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(1)(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)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + 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)(1)(iv)(02) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. + 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)(1)(iv)(04) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of 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)(1)(iv)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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