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Capital Stock (Tables)
6 Months Ended
Jun. 30, 2016
Equity [Abstract]  
Schedule of common stock warrants issued and outstanding
As of June 30, 2016, the following warrants remain outstanding:
 
June 30, 2016
Issue Date
Shares Subject
to Warrants
 
Exercise Price
per Share
 
Expiration
September 28, 2007
72,727
 
$
8.25

 
September 28, 2017