Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 3)

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Stockholders' Equity (Details 3)
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Stockholders Equity [Line Items]    
Annual dividend 0.00% 0.00%
Minimum [Member]    
Stockholders Equity [Line Items]    
Expected life (in years) 5 years 9 months 18 days 4 years
Risk free interest rate 1.70% 1.12%
Expected volatility 69.30% 68.80%
Maximum [Member]    
Stockholders Equity [Line Items]    
Expected life (in years) 6 years 8 years 6 months
Risk free interest rate 1.78% 2.50%
Expected volatility 71.80% 100.00%