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Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2017
Schedule Of Share Based Compensation Warrants Activity [Table Text Block]
The following weighted-average assumptions were utilized in the calculation of the fair value of the stock options:
 
Expected life
 
 
6.25 years
 
Weighted average volatility
 
 
69%
 
Forfeiture rate
 
 
13%
 
Weighted average risk-free interest rate
 
 
1.90%
 
Expected dividend rate
 
 
0%
 
Warrant [Member]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The Company has the following warrants outstanding at June 30, 2017:
 
 
 
 
 
 
 
Wtd. Avg.
 
 
 
 
 
 
 
 
 
Exercise
 
Remaining Life
 
Exercise Price
 
 
Warrants
 
Price
 
(in years)
 
 
$1.80
 
 
 
80,000
 
 
$1.80
 
 
3.64
 
 
$4.00
 
 
 
2,395,471
 
 
$4.00
 
 
1.57
 
 
$10.00
 
 
 
20,313
 
 
$10.00
 
 
1.68
 
 
 
 
 
 
2,495,784
 
 
$3.98