Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Assumptions used for the awards (Details)

v3.19.3
Stock-Based Compensation - Assumptions used for the awards (Details) - $ / shares
9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Stock-Based Compensation    
Exercise price   $ 0.69
Expected dividends   0.00%
Expected volatility   86.00%
Risk -free interest rate   2.75%
Expected life of option 4 years 4 years