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Stockholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2018
Schedule Of Share Based Compensation Warrants Activity [Table Text Block]
The Company has the following warrants outstanding at March 31, 2018:
 
 
 
 
Total Outstanding Warrants
 
 
 
 
 
 
Wtd. Avg.
 
Remaining
 
 
 
 
 
 
Exercise
 
Life
 
Exercise Price
 
Warrants
 
Price
 
(in years)
 
$
1.80
 
 
80,000
 
$
1.80
 
 
2.88
 
$
4.00
 
 
2,395,471
 
$
4.00
 
 
0.82
 
$
10.00
 
 
20,313
 
$
10.00
 
 
0.93
 
 
 
 
 
2,495,784
 
$
3.98