XML 82 R52.htm IDEA: XBRL DOCUMENT v3.20.1
Stockholders' Equity - Summary of Fair Value of Options Using Black-Sholes Option Pricing Model (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Volatility (based on a comparable company), minimum 59.82% 59.82%
Volatility (based on a comparable company), maximum 77.19% 70.29%
Risk Free interest rate. minimum 1.79% 2.78%
Risk Free interest rate, maximum 2.78% 2.93%
Dividend yield (on common stock) 0.00% 0.00%
Minimum [Member]    
Expected life (in years) 5 years 6 months 5 years 6 months
Maximum [Member]    
Expected life (in years) 8 years 8 years