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Derivative Liabilities (Tables)
 3 Months Ended
Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
The derivative liabilities were calculated using the Black-Scholes pricing valuation model with the following weighted average assumptions:
  
Warrants derivative liabilities
 
March 31,
2019
 
 
December 31,
2018
 
Risk-free interest rate
 
 
1.37%
 
 
1.37%
Expected life of derivative liability
 
 
1.44 years
 
 
 
1.69 years
 
Expected volatility
 
 
173.18%
 
 
93.96%
Dividend rate
 
 
0.00%
 
 
0.00%
 
 
 
 
 
 
 
 
 
GQM LLC Warrants derivative liability
 
March 31,

2019
 
 
December 31,

2018
 
Risk-free interest rate
 
 
2.23
%
 
 
2.65
%
Expected life of derivative liability
 
 
4.75 years
 
 
 
4.89 years
 
Expected volatility
 
 
20.00
%
 
 
20.00
%
Dividend rate
 
 
0.00
%
 
 
0.00
%
 
 
 
 
 
 
 
 
 
Schedule of Derivative Liability for Share Purchase Warrants [Table Text Block]
The change in the derivative liabilities is as follows:
 
 
 
March 31,

2019
 
 
December 31,

2018
 
Balance, beginning of the period
 
$
3,390
 
 
$
441
 
GQM LLC Warrants (Note 13(v))
 
 
-
 
 
 
3,314
 
Change in fair value
 
 
150
 
 
 
(365
)
Balance, end of the period
 
$
3,540
 
 
$
3,390