Stockholders' Equity Note Disclosure [Text Block] | 7. Share Capital Reverse Share Split On May 4, 2018, the Company effected a share consolidation (reverse split) of the Company's common shares at a ratio of 1-for-7. As a result of the reverse split, every seven shares of the issued and outstanding common shares, without par value, consolidated into one newly-issued outstanding common share, without par value, after fractional rounding. The number of warrants and options were proportionately adjusted by the split ratio and the exercise prices correspondingly increased by the same split ratio. All shares and exercise prices are presented on a post-split basis in these condensed interim consolidated financial statements. Black-Scholes option valuation model The Company uses the Black-Scholes option valuation model to determine the fair value of share-based compensation for placement agent warrants and share options granted. Option valuation models require the input of highly subjective assumptions including the expected price volatility. The Company has used historical volatility to estimate the volatility of the share price. Changes in the subjective input assumptions can materially affect the fair value estimates, and therefore the existing models do not necessarily provide a reliable single measure of the fair value of the Company’s warrants and share options. Warrants A summary of the Company’s warrants activity is as follows: Number of Warrants Weighted Average Exercise Price Balance - September 30, 2017 180,805 $ 31.50 Granted 5,665,528 2.68 Granted pre-funded warrants 687,076 .01 Exercised (1,752,373 ) 2.65 Exercised pre-funded warrants (687,076 ) .01 Balance - September 30, 2018 4,093,960 $ 3.96 Expired (2,044,152 ) 2.65 Balance - March 31, 2019 2,049,808 $ 5.27 The weighted average contractual life remaining on the outstanding warrants at March 31, 2019 is 48 months. The following table summarizes information about the warrants outstanding at March 31, 2019: Exercise Price Number of Warrants Expiry Date $ 31.50 180,805 January 2022 2.65 1,645,175 May 2023 3.31 223,828 May 2023 2,049,808 Share Options The Company adopted an incentive compensation plan in 2017 (the Incentive Plan), which amended and restated the 2013 fixed share option plan and is administered by the Board of Directors. Options, restricted shares and restricted share units are eligible for grants under the Incentive Plan. The number of shares available for issuance under the Incentive Plan is 228,143, including shares available for the exercise of outstanding options under the 2013 fixed share option plan. No restricted shares or restricted share units have been granted as of March 31, 2019. The exercise price of an option is set at the closing price of the Company’s common shares on the date of grant. Share options granted to directors, officers, employees and certain individual consultants for past service are subject to the following vesting schedule: (a) one-third shall vest immediately, (b) one-third shall vest at 12 months from the date of grant and (c) one-third shall vest at 18 months from the date of grant. Share options granted to directors, officers, employees and certain individual consultants for future service are subject to the following vesting schedule: (x) one-third shall vest at 12 months from the date of grant, (y) one-third shall vest at 24 months from the date of grant and (z) one-third shall vest at 36 months from the date of grant. Share options granted to certain individual investor relations consultants are subject to the following vesting schedule: (aa) 25% shall vest at 3 months from the date of grant, (bb) 25% shall vest at 6 months from the date of grant, (cc) 25% shall vest at 12 months from the date of grant and (dd) 25% shall vest at 15 months from the date of grant. Options have been granted under the Incentive Plan allowing the holders to purchase common shares of the Company as follows: Number of Options Weighted Average Exercise Price Balance – September 30, 2017 58,711 $ 40.18 Granted 29,426 5.88 Expired (2,266 ) 84.87 Expired (15,373 ) 42.07 CDN $ Balance – September 30, 2018 70,498 $ 25.42 Granted 2,142 1.25 Expired (7,927 ) 30.65 Expired (7,786 ) 56.73 CDN $ Balance – March 31, 2019 56,927 $ 20.97 The weighted average contractual life remaining on the outstanding options is 45 months. The following table summarizes information about the options under the Incentive Plan outstanding and exercisable at March 31, 2019: Number of Options Exercisable at March 31, 2019 Range of exercise prices Expiry Dates 12,479 12,479 CDN$15.00 - 35.00 Apr 2019-Dec 2019 35,903 26,213 $1.00 - 20.00 Sep 2023-Mar 2026 2,214 2,214 CDN$40.00 - 70.00 May 2020-Jun 2022 1,901 1,901 $50.00 - 60.00 Dec 2022 1,644 1,644 CDN$105.00 - 110.00 Nov 2021 2,786 2,786 $120.00 - 130.00 Nov 2020 56,927 47,237 The estimated fair value of the share options granted during the six months ended March 31, 2019 was determined using a Black-Scholes option valuation model with the following weighted average assumptions: Six Months Ended March 31, March 31, 2019 2018 Risk free interest rate 1.67 % 2.13 % Expected life (years) 7.00 7.00 Expected share price volatility 153 % 155 % Expected dividend yield 0 % 0 % The weighted average fair value of share options granted during the six months ended March 31, 2019 and 2018 was $1.20 and $5.67 respectively. As of March 31, 2019, the Company had approximately $23,000 of unrecognized share-based compensation expense, which is expected to be recognized over a period of 22 months. |