Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity (Details 2)

v3.20.1
Shareholders' Equity (Details 2) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Equity [Abstract]    
Expected term, in years 5 years 9 months 18 days 5 years 9 months 18 days
Expected volatility 72.89% 68.72%
Risk-free interest rate 2.34% 3.01%
Dividend yield
Grant date fair value $ 2.58 $ 2.59