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16. Stock Options (Details-Option activity) - Stock Options [Member] - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Stock Options |  |
Number of Options outstanding beginning balance | 9,116,176 |
Number of Options Granted | 660,000 |
Number of Options Exercised | 0 |
Number of Options Cancelled | 45,000 |
Number of Options Expired | 0 |
Number of Options outstanding ending balance | 9,731,176 | 9,116,176
Number of Options exercisable | 6,434,452 | 6,449,452
Exercise Price Per Share |  |
Exercise price per share, range | 1.39 - 10.00 |
Exercise price per share, options granted | 3.06 |
Exercise price per share, options cancelled | 2.61 |
Exercise prices at period end | 1.39 - 10.00 |
Exercise price per share, exercisable | 1.39 - 3.17 | 1.39 - 9.00
Weighted Average Remaining Contractual Life | 8 years 10 months 10 days | 9 years 4 months 13 days
Weighted average remaining contractual life, options granted | 4 years 9 months 29 days |
Weighted average remaining contractual life, options cancelled | 4 years 2 months 27 days |
Weighted average remaining contractual life, exercisable | 9 years 5 months 5 days | 6 years 2 months 30 days
Weighted Average Exercise Price per Share beginning balance | $ 1.69 |
Weighted Average Exercise Price Options Granted | 3.06 |
Weighted Average Exercise Price Options Cancelled | 2.61 |
Weighted Average Exercise Price Options Expired |  |
Weighted Average Exercise Price per Share ending balance | 1.78 | $ 1.69
Weighted Average Exercise Price per Share Exercisable | $ 1.44 | $ 7.67
Aggregate intrinsic value, options outstanding | $ 0 | $ 0
Aggregate intrinsic value, exercisable | $ 0 | $ 0

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