Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | 10. Stock-based compensation During the three September 30, 2018, 85,000 three September 30, 2017, 427,940 nine September 30, 2018 1,866,996, nine September 30, 2017, 925,000 1,815,000 one The continuity of stock options are as follows: Number of Options Weighted Avg Exercise Price (CDN$) Balance at December 31, 2016 7,975,000 0.84 Stock options exercised on February 21, 2017 (10,000 ) 0.25 Stock options exercised on February 21, 2017 (400,000 ) 0.05 Options issued on February 24, 2017 535,000 1.50 Stock options exercised on May 8, 2017 (7,060 ) 1.50 Stock options cancelled on May 17, 2017 (10,000 ) 1.50 Stock options exercised on May 23, 2017 (80,000 ) 0.25 Stock options exercised on July 6, 2017 (200,000 ) 0.05 Stock options exercised on July 17, 2017 (220,000 ) 0.25 Options issued on August 14, 2017 1,280,000 2.75 Stock options exercised on August 29, 2017 (7,940 ) 1.50 Stock options exercised on December 19, 2017 (25,000 ) 0.25 Stock options exercised on December 19, 2017 (750,000 ) 1.50 Balance at December 31, 2017 8,080,000 1.21 Stock options exercised on January 8, 2018 (124,000 ) 0.25 Stock options exercised on January 26, 2018 (100,000 ) 0.25 Stock options exercised on March 8, 2018 (50,000 ) 0.25 Stock options exercised on March 13, 2018 (176,000 ) 0.25 Stock options exercised on March 22, 2018 (50,000 ) 0.25 Stock options exercised on March 26, 2018 (240,000 ) 0.25 Stock options exercised on March 28, 2018 (325,000 ) 0.25 Stock options exercised on March 29, 2018 (562,996 ) 2.75 Stock options exercised on April 20, 2018 (154,000 ) 0.25 Stock options expired on April 21, 2018 (1,946,000 ) 0.25 Stock options cancelled on June 8, 2018 (100,000 ) 1.50 Stock options cancelled on June 21, 2018 (400,000 ) 1.50 Stock options cancelled on August 14, 2018 (75,000 ) 2.75 Stock options exercised on September 27, 2018 (85,000 ) 1.50 Stock options cancelled on September 28, 2018 (5,000 ) 2.75 Balance at September 30, 2018 3,687,004 1.72 As at September 30, 2018, Grant date Exercise price (CDN$) Number of options issued and outstanding Number of vested options outstanding Weighted avg remaining life (years) December 21, 2016 1.50 2,415,000 2,415,000 0.22 December 21, 2016 1.50 100,000 100,000 0.12 February 24, 2017 1.50 35,000 35,000 0.40 February 24, 2017 1.50 500,000 500,000 0.12 August 14, 2017 (a) 2.75 387,004 387,004 0.87 August 14, 2017 (a) 2.75 250,000 250,000 0.12 The fair value of options granted during the three nine September 30, 2018 December 31, 2017 February 24, 2017 August 14, 2017 (a) August 14, 2017 (b) Volatility 59 % 59 % 83 % Risk-free interest rate 0.81 % 1.22 % 1.22 % Expected life (years) 2 2 1 Dividend yield 0 % 0 % 0 % Common share price CDN $1.35 CDN $2.40 CDN $2.40 Strike price CDN $1.50 CDN $2.75 CDN $2.75 Forfeiture rate nil nil nil The Company recorded nil three September 30, 2018 ( three September 30, 2017 - $675,941 $7,288 nine September 30, 2018 ( nine September 30, 2017 - $161,590 $98,715 $34,608 three September 30, 2018. $1,537,024 $386,898 nine September 30, 2018. Volatility is determined based on volatilities of comparable companies when the Company does not The risk-free rate assumed in valuing the options is based on the Canadian treasury yield curve in effect at the time of grant for the expected term of the option. The expected dividend yield percentage at the date of grant is nil not nil three nine September 30, 2018 ( three September 30, 2017 - $nil |