Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Warrants (Schedule of Weighted Average Assumptions) (Details)

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Warrants (Schedule of Weighted Average Assumptions) (Details) - Years
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Risk-free interest rate 2.02% 2.70%
Expected volatility 77.00% 98.00%
Expected life (years) 4.2 4.4
Warrants [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Risk-free interest rate 1.84% 2.70%
Expected volatility 68.00% 72.00%
Expected dividend yield
Expected life (years) 2 2