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Stock-Based Compensation Stock option activity during the year (Tables)
 12 Months Ended
Dec. 31, 2018
Stock option activity during the year [Abstract]  
Share-based Compensation, Stock Options, Activity [Table Text Block]
The following table summarizes the stock option activity during the year ended December 31, 2018:
 
 
 
 
 
 
 
 
 
 
Number of Options Outstanding
 
Weighted-Average Exercise Price
 
Weighted-Average Remaining Contractual Term (in years)
 
Aggregate Intrinsic Value
(in thousands)
Outstanding at December 31, 2017
 
651,875

 
$
4.51

 
0.4

 
$
352

Granted
 
—

 
—

 


 


Exercised
 
—

 
—

 


 


Expired
 
(611,875
)
 
4.50

 


 


Outstanding at December 31, 2018
 
40,000

 
$
4.67

 
1.3

 
$
—

Exercisable at December 31, 2018
 
40,000

 
$
4.67

 
1.3

 
$
—

The following table summarizes information about warrants outstanding at December 31, 2018:
 
December 31, 2018
 
 
Exercise Price
 
Date of Issue
 
Expiry Date
 
Remaining Contractual Life (in years)
 
Number Outstanding
 
$
5.00

 
16-Sep-13
 
15-Sep-23
 
4.7
 
3,280,790

 
$
5.00

 
3-Feb-14
 
15-Sep-23
 
4.7
 
1,392,975

 
 
 
 
Total:
 
4.7
 
4,673,765