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Note 14 - Stock-based Compensation (Tables) | 12 Months Ended
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Jul. 31, 2021
Notes Tables |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | Year Ended July 31, |
|  | 2021 |  |  | 2020 |
Expected Risk Free Interest Rate |  |  | 0.70 | % |  |  | 0.40 | %
Expected Volatility |  |  | 72.57 | % |  |  | 60.48 | %
Expected Life in Years |  |  | 5.0 |  |  |  | 4.9 |
Expected Dividend Yield |  |  | 0 | % |  |  | 0 | %
Weighted-Average Grant Date Fair Value |  | $ | 1.30 |  |  | $ | 0.45 |
Share-based Payment Arrangement, Option, Activity [Table Text Block] |
|  | Number of Stock Options |  |  | Weighted Average Exercise Price |
Balance, July 31, 2019 |  |  | 15,738,350 |  |  | $ | 1.30 |
Granted |  |  | 6,163,900 |  |  |  | 0.95 |
Cancelled/Forfeited |  |  | (179,344 | ) |  |  | 1.02 |
Expired |  |  | (6,208,156 | ) |  |  | 1.39 |
Balance, July 31, 2020 |  |  | 15,514,750 |  |  |  | 1.13 |
Granted |  |  | 959,588 |  |  |  | 2.21 |
Exercised |  |  | (4,705,005 | ) |  |  | 1.09 |
Expired |  |  | (1,365,000 | ) |  |  | 1.48 |
Balance, July 31, 2021 |  |  | 10,404,333 |  |  | $ | 1.21 |
Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block] |
|  | Year Ended July 31, |
|  | 2021 |  |  | 2020 |
Number of Options Exercised on Forfeiture Basis |  |  | 2,970,878 |  |  |  | - |
Number of Options Exercised on Cash Basis |  |  | 1,734,127 |  |  |  | - |
Total Number of Options Exercised |  |  | 4,705,005 |  |  |  | - |
Number of Shares Issued on Cash Exercise |  |  | 1,734,127 |  |  |  | - |
Number of Shares Issued on Forfeiture Basis |  |  | 1,592,128 |  |  |  | - |
Total Number of Shares Issued Upon Exercise of Options |  |  | 3,326,255 |  |  |  | - |
Cash Received from Exercise of Stock Options |  | $ | 1,915,995 |  |  | $ | - |
Total Intrinsic Value of Options Exercised |  | $ | 6,882,464 |  |  | $ | - |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] |
|  | Number of Unvested Stock Options |  |  | Weighted Average Grant Date Fair Value |
Balance, July 31, 2019 |  |  | 3,310,600 |  |  | $ | 0.59 |
Granted |  |  | 6,163,900 |  |  |  | 0.45 |
Vested |  |  | (2,590,154 | ) |  |  | 0.60 |
Cancelled/Forfeited |  |  | (86,875 | ) |  |  | 0.43 |
Balance, July 31, 2020 |  |  | 6,797,471 |  |  |  | 0.46 |
Granted |  |  | 959,588 |  |  |  | 1.30 |
Vested |  |  | (3,865,852 | ) |  |  | 0.47 |
Balance, July 31, 2021 |  |  | 3,891,207 |  |  | $ | 0.66 |
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] |
|  |  |  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Outstanding at July 31, 2021 |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (Years) |  |  | Exercisable at July 31, 2021 |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Term (Years) |
$0.80 | to | $0.99 |  |  | 5,342,620 |  |  | $ | 0.92 |  |  |  | 8.56 |  |  |  | 3,289,024 |  |  | $ | 0.92 |  |  |  | 8.35 |
$1.00 | to | $1.49 |  |  | 2,500,125 |  |  |  | 1.17 |  |  |  | 5.30 |  |  |  | 1,616,791 |  |  |  | 1.21 |  |  |  | 3.30 |
$1.50 | to | $2.80 |  |  | 2,561,588 |  |  |  | 1.84 |  |  |  | 4.87 |  |  |  | 1,607,311 |  |  |  | 1.61 |  |  |  | 1.86 |
|  |  |  |  | 10,404,333 |  |  | $ | 1.21 |  |  |  | 6.87 |  |  |  | 6,513,126 |  |  | $ | 1.16 |  |  |  | 5.49 |
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | Number of Restricted Stock Units |  |  | Weighted Average Grant Date Fair Value |
Balance, July 31, 2019 |  |  | 465,000 |  |  | $ | 0.94 |
Granted |  |  | 1,305,000 |  |  |  | 0.91 |
Vested |  |  | (155,000 | ) |  |  | 0.94 |
Balance, July 31, 2020 |  |  | 1,615,000 |  |  |  | 0.92 |
Granted |  |  | 407,617 |  |  |  | 2.15 |
Vested |  |  | (1,025,005 | ) |  |  | 0.91 |
Balance, July 31, 2021 |  |  | 997,612 |  |  | $ | 1.42 |
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] |
Grant Date |  | Number of Restricted Stock Units |  |  | Grant Date Fair Value |  |  | Remaining Life (Years) |  |  | Aggregate Intrinsic Value |
July 30, 2019 |  |  | 154,999 |  |  | $ | 0.94 |  |  |  | 1.00 |  |  | $ | 336,348 |
July 16, 2020 |  |  | 434,996 |  |  |  | 0.91 |  |  |  | 1.96 |  |  |  | 943,941 |
July 21, 2021 |  |  | 407,617 |  |  |  | 2.15 |  |  |  | 2.98 |  |  |  | 884,529 |
|  |  | 997,612 |  |  | $ | 1.42 |  |  |  | 2.22 |  |  | $ | 2,164,818 |
Schedule of Performance Based Restricted Stock Units, Valuation Assumptions [Table Text Block] |
Expected Risk Free Interest Rate |  |  | 0.39 | %
Expected Volatility |  |  | 78.03 | %
Expected Dividend Yield |  |  | 0 | %
Expected Life in Years |  |  | 3 |
Correlation |  |  | 66.02 | %
Grant Price |  | $ | 2.15 |
Grant Date Fair Value |  | $ | 2.48 |
Schedule of Nonvested Performance-based Units Activity [Table Text Block] |
|  | Number of Unvested PRSUs |  |  | Weighted Average Grant Date Fair Value |
Balance, July 31, 2019 |  |  | 890,000 |  |  | $ | 1.15 |
Forfeited |  |  | (132,499 | ) |  |  | 1.15 |
Balance, July 31, 2020 |  |  | 757,501 |  |  |  | 1.15 |
Granted |  |  | 492,950 |  |  |  | 2.48 |
Balance, July 31, 2021 |  |  | 1,250,451 |  |  | $ | 1.67 |
Share-based Payment Arrangement, Cost by Plan [Table Text Block] |
|  | Year Ended July 31, |
|  | 2021 |  |  | 2020 |
Stock-Based Compensation for Consultants |  |  |  |  |  |  |  |
Common stock issued to consultants |  | $ | 876,695 |  |  | $ | 539,552 |
Amortization of stock option expenses |  |  | 288,603 |  |  |  | 240,912 |
|  |  | 1,165,298 |  |  |  | 780,464 |
Stock-Based Compensation for Management |  |  |  |  |  |  |  |
Common stock issued to management |  |  | 135,000 |  |  |  | 225,217 |
Amortization of stock option expenses |  |  | 773,583 |  |  |  | 644,516 |
Amortization of RSU & PRSU expenses |  |  | 1,215,560 |  |  |  | 582,785 |
|  |  | 2,124,143 |  |  |  | 1,452,518 |
Stock-Based Compensation for Employees |  |  |  |  |  |  |  |
Common stock issued to employees |  |  | 1,199,958 |  |  |  | 635,414 |
Amortization of stock option expenses |  |  | 982,179 |  |  |  | 640,011 |
|  |  | 2,182,137 |  |  |  | 1,275,425 |
Settlement of share issuance obligation |  |  | - |  |  |  | (15,189 | )
|  | $ | 5,471,578 |  |  | $ | 3,493,218 |

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