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Note 14 - Stock-based Compensation - Schedule of Outstanding Unvested Stock Options (Details) - $ / shares | 12 Months Ended
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Jul. 31, 2021 | Jul. 30, 2021 | Jul. 31, 2020
Nonvested balance (in shares) | 6,797,471 | 6,797,471 | 3,310,600
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ 0.46 | $ 0.46 | $ 0.59
Granted, number of stock options (in shares) | 959,588 | 959,588 | 6,163,900
Granted, Weighted Average Grant-Date Fair Value (in dollars per share) | $ 1.30 |  | $ 0.45
Vested (in shares) |  | (3,865,852) | (2,590,154)
Vested, Weighted Average Grant-Date Fair Value (in dollars per share) | 0.47 |  | $ 0.60
Cancelled/Forfeited (in shares) |  |  | (86,875)
Cancelled/Forfeited, Weighted Average Grant-Date Fair Value (in dollars per share) |  |  | $ 0.43
Nonvested balance (in shares) |  | 3,891,207 | 6,797,471
Nonvested, Weighted Average Grant-Date Fair Value (in dollars per share) | $ 0.66 |  | $ 0.46

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- Definition For presentations that combine terminations, 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 or that expired. + 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)-(4) -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 The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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