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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2015
Warrant [Member]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The estimated values of warrants, as well as the assumptions that were used in calculating such values, were based on estimates at the issuance date as follows:
 
 
 
Noteholders
 
 
Placement
Agent
 
Risk-free interest rate
 
 
1.76
%
 
 
1.54
%
Weighted average expected term
 
 
5 years
 
 
 
5 years
 
Expected volatility
 
 
134.18
%
 
 
134.18
%
Expected dividend yield
 
 
0.00
%
 
 
0.00
%