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Stock-based compensation (Tables)
12 Months Ended
Dec. 31, 2015
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
For the years ended December 31, 2015 and 2014 option activity was as follows:
 
 
 
 
 
Weighted-Average
 
Remaining Contractual Term
 
 
 
Shares
 
Exercise Price
 
(in years)
 
Outstanding at January 1, 2014
 
 
-
 
$
-
 
 
 
 
Granted
 
 
200,000
 
 
0.17
 
 
4.38
 
Expired and forfeited
 
 
-
 
 
 
 
 
 
 
Exercised
 
 
-
 
 
 
 
 
 
 
Outstanding at December 31, 2014
 
 
200,000
 
$
0.17
 
 
4.38
 
 
 
 
 
 
 
 
 
 
 
 
Granted
 
 
-
 
 
 
 
 
 
 
Expired and forfeited
 
 
(25,000)
 
$
0.17
 
 
3.38
 
Exercised
 
 
-
 
 
 
 
 
 
 
Outstanding at December 31, 2015
 
 
175,000
 
$
0.17
 
 
3.38
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable at December 31, 2015
 
 
175,000
 
$
0.17
 
 
3.38