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Stockholders' Equity (Tables)
3 Months Ended
Sep. 30, 2015
Stockholders Equity Note [Abstract]  
Schedule of Stockholders Equity Note, Warrants or Rights [Table Text Block]
The following table summarizes all warrant activity for the three months ended September 30, 2015:
   
 
 
 
Weighted-
 
 
 
 
average
 
 
 
 
Exercise
 
 
 
Warrants
 
Price
 
Outstanding as of July 1, 2015
 
 
6,633,324
 
$
1.63
 
Exercised
 
 
(120,000)
 
 
0.53
 
Expired
 
 
(500,000)
 
 
1.10
 
Outstanding and exercisable as of September 30, 2015
 
 
6,013,324
 
$
1.70