Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Stock-Based Compensation (Details 7)

v3.19.1
Stockholders' Equity and Stock-Based Compensation (Details 7) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Expected volatility 90.00%  
Risk free interest rate 2.84%  
Dividend yield rate 0.00% 0.00%
Weighted average remaining expected life 9 years 9 months 18 days  
Closing price per share - common stock $ 0.88  
Option Grants Awards Issued In 2017 [Member]    
Dividend yield rate 0.00%  
Weighted average remaining expected life 4 years 2 months 12 days  
Closing price per share - common stock $ 1.05  
Minimum [Member]    
Expected volatility 87.50%  
Risk free interest rate 2.24%  
Maximum [Member]    
Expected volatility 91.00%  
Risk free interest rate 2.42%