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Note 14 - Stock-based Compensation - Schedule of Outstanding Stock Options (Details) - $ / shares | 12 Months Ended
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Jul. 31, 2021 | Jul. 30, 2021 | Jul. 31, 2020
Balance, number of stock options (in shares) | 15,514,750 | 15,514,750 | 15,738,350
Balance, Weighted Average Exercise Price (in dollars per share) | $ 1.13 | $ 1.13 | $ 1.30
Granted, number of stock options (in shares) | 959,588 | 959,588 | 6,163,900
Granted, Weighted Average Exercise Price (in dollars per share) | $ 2.21 |  | $ 0.95
Cancelled/Forfeited, number of stock options (in shares) |  |  | (179,344)
Cancelled/Forfeited, Weighted Average Exercise Price (in dollars per share) |  |  | $ 1.02
Expired, number of stock options (in shares) | (1,365,000) |  | (6,208,156)
Expired, Weighted Average Exercise Price (in dollars per share) | $ 1.48 |  | $ 1.39
Exercised (in shares) | (4,705,005) |  |
Exercised Options, Weighted Average Exercise Price (in dollars per share) | $ 1.09 |  |
Balance, number of stock options (in shares) | 10,404,333 |  | 15,514,750
Balance, Weighted Average Exercise Price (in dollars per share) | $ 1.21 |  | $ 1.13

X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&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 No definition available. + 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 No definition available. + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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