Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Estimated Fair Value Of Awards Granted (Details)

v3.20.1
Stockholders' Equity - Estimated Fair Value Of Awards Granted (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Minimum    
Class of Stock [Line Items]    
Expected stock volatility 8220.00% 7690.00%
Risk free interest rate 170.00% 210.00%
Expected years until exercise 1 year 2 years 6 months
Maximum    
Class of Stock [Line Items]    
Expected stock volatility 87.50% 86.30%
Risk free interest rate 2.60% 3.00%
Expected years until exercise 4 years 3 years 6 months