| Schedule of outstanding and exercisable options |
| | | | | | | | | | | | | | | | | | | | | | | | | 2022 | | 2021 | | | | | | | | Weighted | | | | | | | Weighted | | | | Number | | | | average | | | Number | | | | average | | | | of shares | | | | exercise | | | of shares | | | | exercise | | | | 2019 Plan | | | 2011 Plan | | Total | | price | | | 2019 Plan | | | 2011 Plan | | Total | | price | Outstanding at beginning of year - 2011 Plan | | | — | | | 1,995,971 | | 1,995,971 | | $ | 2.07 | | | — | | | 2,080,087 | | 2,080,087 | | $ | 2.15 | Outstanding at beginning of year - 2019 Plan | | | 3,759,834 | | | — | | 3,759,834 | | | 9.51 | | | 1,706,190 | | | — | | 1,706,190 | | | 13.55 | Granted - 2019 Plan | | | 1,385,700 | | | — | | 1,385,700 | | | 5.47 | | | 1,863,950 | | | — | | 1,863,950 | | | 6.31 | Exercised - 2011 Plan | | | — | | | (9,500) | | (9,500) | | | 1.12 | | | — | | | (16,753) | | (16,753) | | | 0.88 | Exercised - 2019 Plan | | | (10,267) | | | — | | (10,267) | | | 3.76 | | | (1,250) | | | — | | (1,250) | | | 3.74 | Forfeited - 2011 Plan | | | — | | | — | | — | | | 9.42 | | | — | | | — | | — | | | — | Forfeited - 2019 Plan | | | — | | | — | | — | | | 8.64 | | | — | | | — | | — | | | — | Cancelled - 2011 Plan | | | — | | | (19,387) | | (19,387) | | | 9.42 | | | — | | | — | | — | | | — | Cancelled - 2019 Plan | | | (5,162) | | | — | | (5,162) | | | 21.48 | | | — | | | — | | — | | | — | Outstanding at end of period | | | 5,130,105 | | | 1,967,084 | | 7,097,189 | | $ | 6.64 | | | 3,568,890 | | | 2,063,334 | | 5,632,224 | | $ | 6.99 | Outstanding at end of period - Weighted average exercise price | | $ | 8.42 | | $ | 2.00 | | | | | | | $ | 9.77 | | $ | 2.16 | | | | | | Exercisable at end of period | | | 1,721,521 | | | 1,825,299 | | 3,546,820 | | $ | 5.83 | | | 591,885 | | | 1,613,229 | | 2,205,114 | | $ | 4.86 | Exercisable at end of period - Weighted average exercise price | | $ | 9.94 | | $ | 1.95 | | | | | | | $ | 12.55 | | $ | 2.05 | | | | | |
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| Schedule of non-vested share options activity |
| | | | | | | | | | | | | | | | | | | | | 2022 | | 2021 | | | Number | | | | Weighted | | | Number | | | | Weighted | | | of options | | | | average | | | of options | | | | average | | | 2019 Plan | | 2011 Plan | | Total | | fair value | | | 2019 Plan | | 2011 Plan | | Total | | fair value | Non-vested share options at beginning of year - 2011 Plan | | — | | 200,639 | | 200,639 | | $ | 1.86 | | | — | | 543,192 | | 543,192 | | $ | 1.81 | Non-vested share options at beginning of year - 2019 Plan | | 2,665,518 | | — | | 2,665,518 | | $ | 6.39 | | | 1,438,026 | | — | | 1,438,026 | | $ | 10.28 | Granted - 2019 Plan | | 1,385,700 | | — | | 1,385,700 | | | 4.13 | | | 1,863,950 | | — | | 1,863,950 | | | 4.79 | Vested, outstanding 2011 Plan | | — | | (58,854) | | (58,854) | | | 1.74 | | | — | | (93,087) | | (93,087) | | | 1.61 | Vested, outstanding 2019 Plan | | (642,634) | | — | | (642,634) | | | 5.41 | | | (324,971) | | — | | (324,971) | | | 11.38 | Forfeited - 2011 Plan | | — | | — | | — | | | — | | | — | | — | | — | | | - | Forfeited - 2019 Plan | | — | | — | | — | | | — | | | — | | — | | — | | | - | Non-vested share options at end of period | | 3,408,584 | | 141,785 | | 3,550,369 | | $ | 5.51 | | | 2,977,005 | | 450,105 | | 3,427,110 | | $ | 6.08 | Non-vested share options at end of period - Weighted average fair value | $ | 5.66 | $ | 1.91 | | | | | | | $ | 6.72 | $ | 1.85 | | | | | |
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