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Stockholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2015
Schedule Of Share Based Payment Award Warrants Valuation Assumptions [Table Text Block]
The following weighted-average assumptions were utilized in the calculation of the fair value of the stock options:
 
Expected life
 
5.81 years
 
Weighted average volatility
 
72
%
Forfeiture rate
 
11
%
Weighted average risk-free interest rate
 
1.46
%
Expected dividend rate
 
0
%
Schedule Of Share Based Compensation Warrants Activity [Table Text Block]
The Company has the following warrants outstanding at June 30, 2015:
 
 
 
Total Outstanding Warrants
 
 
 
 
 
Weighted Average
 
Life
 
Exercise Price
 
Warrants
 
Exercise Price
 
(in years)
 
$1.80
 
80,000
 
$
1.80
 
5.64
 
$2.20
 
118,959
 
$
2.20
 
0.86
 
$5.00
 
345,000
 
$
5.00
 
1.82
 
$10.00
 
20,313
 
$
10.00
 
3.68
 
 
 
564,272
 
$
4.14