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Note 13 - Capital Stock (Tables) | 12 Months Ended
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Jul. 31, 2021
Notes Tables |
Schedule of Warrants, Valuation Assumptions [Table Text Block] |
Expected Risk Free Interest Rate |  |  | 0.14 | %
Expected Annual Volatility |  |  | 76.81 | %
Expected Contractual Life in Years |  |  | 2.00 |
Expected Annual Dividend Yield |  |  | 0.00 | %
Expected Risk Free Interest Rate |  |  | 0.85 | %
Expected Annual Volatility |  |  | 72.17 | %
Expected Contractual Life in Years |  |  | 5.00 |
Expected Annual Dividend Yield |  |  | 0.00 | %
Schedule of Net Proceeds Allocation [Table Text Block] |
Fair Value of Shares |  | $ | 12,000,000 |
Fair Value of Share Purchase Warrants |  |  | 1,445,756 |
Total Fair Value Before Allocation to Net Proceeds |  | $ | 13,445,756 |
Gross Proceeds |  | $ | 15,000,000 |
Share Issuance Costs - Cash |  |  | (878,344 | )
Net Cash Proceeds Received |  | $ | 14,121,656 |
Relative Fair Value Allocation to: |  |  |  |
Shares |  | $ | 12,603,224 |
Share Purchase Warrants |  |  | 1,518,432 |
|  | $ | 14,121,656 |
Schedule Of Share based Compensation Warrants Activity [Table Text Block] |
|  | Number of Warrants |  |  | Weighted Average Exercise Price |
Balance, July 31, 2019 |  |  | 19,443,910 |  |  | $ | 1.94 |
Issued |  |  | 300,000 |  |  |  | 1.38 |
Expired |  |  | (12,021,929 | ) |  |  | 1.87 |
Balance, July 31, 2020 |  |  | 7,721,981 |  |  |  | 2.03 |
Issued in connection with September 2020 Offering |  |  | 6,833,333 |  |  |  | 1.80 |
Issued in connection with April 2021 Offering |  |  | 181,818 |  |  |  | 4.13 |
Exercised |  |  | (8,240,505 | ) |  |  | 1.99 |
Expired |  |  | (1,109,304 | ) |  |  | 1.87 |
Balance, July 31, 2021 |  |  | 5,387,323 |  |  | $ | 1.90 |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
Weighted Average Exercise Price |  |  | Number of Warrants Outstanding |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Expiry Date
$ | 2.30 |  |  |  | 271,546 |  |  |  | 1.02 |  |  | August 9, 2022
| 1.64 |  |  |  | 25,000 |  |  |  | 1.80 |  |  | May 21, 2023
| 1.80 |  |  |  | 4,908,959 |  |  |  | 1.15 |  |  | September 23, 2022
| 4.13 |  |  |  | 181,818 |  |  |  | 4.68 |  |  | April 5, 2026
$ | 1.90 |  |  |  | 5,387,323 |  |  |  | 1.26 |  |  |

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- Definition Tabular disclosure of share based compensation warrants activity. + References No definition available. + Details
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- Definition Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775 + Details
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