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Stock Options - Schedule of Stock Option Activities (Details) - $ / shares | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Number of shares, Beginning Balance |  | 660,000 | 660,000
Number of shares, Granted |  |  | 347,000
Number of shares, Cancelled or expired | (10,000) |  | (56,112)
Number of shares, Exercised | (25,000) |  | (315,888)
Number of shares, Ending Balance |  |  | 635,000
Weighted average exercise price, Beginning Balance |  | $ 1.35 | $ 1.35
Weighted average exercise price, Granted |  |  | 2.99
Weighted average exercise price, Cancelled or expired | $ 2.85 |  | 1.41
Weighted average exercise price, Exercised | $ 0.99 |  | 1.15
Weighted average exercise price, Ending Balance |  |  | 2.31
Minimum [Member] |  |  |
Exercise price per share, Beginning Balance |  | 0.75 | 0.75
Exercise price per share, Granted |  |  | 2.44
Exercise price per share, Cancelled or expired |  | 2.44 | 0.75
Exercise price per share, Exercised |  | 0.75 | 0.75
Exercise price per share, Ending Balance |  |  | 0.75
Maximum [Member] |  |  |
Exercise price per share, Beginning Balance |  | 1.75 | 1.75
Exercise price per share, Granted |  |  | 4.13
Exercise price per share, Cancelled or expired |  | 3.46 | 3.46
Exercise price per share, Exercised |  | $ 1.05 | 1.70
Exercise price per share, Ending Balance |  |  | $ 4.13

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