Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Stock-Based Compensation (Details 2)

v3.20.1
Stockholders' Equity and Stock-Based Compensation (Details 2) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Risk free interest rate 1.65%  
Dividend yield rate 0.00% 0.00%
Weighted average remaining expected life 5 years  
Closing price per share - common stock $ 3.82  
Expected volatility 86.00%  
Short-Term Non-Qualified Option Grants [Member] | 2015 Equity Incentive Plan [Member] | Directors, Officers and Employees [Member] | December 2, 2019 [Member]    
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 $ 10.56  
Expected volatility 90.00%