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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2016
Class of Stock [Line Items]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
The weighted average estimated values of employee stock option grants, as well as the weighted average assumptions that were used in calculating such values during the three and nine months ended September 30, 2016, were based on estimates at the date of grant as follows:
 
 
 
January 1,
 
February 10,
 
 
 
2016 Grant
 
2016 Grant
 
Risk-free interest rate
 
 
1.76
%
 
1.15
%
Weighted average expected term
 
 
5 years
 
 
5 years
 
Expected volatility
 
 
134.18
%
 
132.97
%
Expected dividend yield
 
 
0.00
%
 
0.00
 
Warrant [Member]  
Class of Stock [Line Items]  
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:
 
 
 
 
 
Placement
 
 
 
Noteholders
 
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
%
 
Pursuant to the terms of the Equity Offering and the Note Conversion Offering, the Company agreed to file a registration statement with the SEC covering the re-sale of the Shares sold in the Equity Offering and the Note Conversion Offering and the Shares issuable upon exercise of the Placement Agent warrants. The registration statement was declared effective on May 5, 2016.