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Derivative Liabilities (Tables)
 9 Months Ended
Sep. 30, 2017
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
The derivative liabilities were calculated using the binomial and the Black-Scholes pricing valuation models with the following assumptions:
 
Warrants related to June 2015 Loan
 
September 30,
2017
 
December 31,
2016
 
Risk-free interest rate
 
 
1.58
%
 
0.84
%
Expected life of derivative liability
 
 
2.69 years
 
 
3.44 years
 
Expected volatility
 
 
76.50
%
 
78.79
%
Dividend rate
 
 
0.00
%
 
0.00
%
 
Warrants related to November 2016 Loan
 
September 30,
2017
 
December 31,
2016
 
Risk-free interest rate
 
 
1.58
%
 
1.11
%
Expected life of derivative liability
 
 
4.15 years
 
 
4.89 years
 
Expected volatility
 
 
75.21
%
 
77.21
%
Dividend rate
 
 
0.00
%
 
0.00
%
Schedule of Derivative Liability for Share Purchase Warrants [Table Text Block]
The change in the derivative share purchase warrants is as follows:
 
 
 
September 30,
2017
 
December 31,
2016
 
Balance, beginning of the period
 
$
5,458
 
$
2,498
 
Fair value at inception
 
 
-
 
 
3,090
 
Change in fair value
 
 
(2,329)
 
 
(130)
 
Balance, end of the period
 
$
3,129
 
$
5,458
 
Warrant [Member]  
Schedule of Derivative Liability for Share Purchase Warrants [Table Text Block]
The change in the derivative share purchase warrants is as follows:
 
 
 
September 30,
2017
 
December 31,
2016
 
Fair value of warrants issued
 
$
972
 
$
2,701
 
Change in fair value of warrants
 
 
(704)
 
 
(1,729)
 
Balance, end of the period
 
$
268
 
$
972
 
Derivative Financial Instruments, Liabilities [Member]  
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
As at September 30, 2017, the Company had re-measured the share purchase warrants and determined the fair value of the derivative liability to be $0.3 million (December 31, 2016 - $1.0 million) using the Black-Scholes option pricing model with the following assumptions:
 
 
 
September 30,
2017
 
December 31,
2016
 
Risk-free interest rate
 
 
1.52
%
 
0.84
%
Expected life of derivative liability in years
 
 
1.82 years
 
 
2.56 years
 
Expected volatility
 
 
74.89
%
 
79.40
%
Dividend rate
 
 
0.00
%
 
0.00
%