Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Valuation Assumptions (Details)

v3.20.2
Stock-based Compensation - Valuation Assumptions (Details) - 2014 Plan
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Dividend yield 0.00% 0.00% 0.00% 0.00%
Risk-free interest rate   2.09% 1.58% 2.12%
Expected term (in years)   6 years 5 years 7 months 6 days 6 years
Volatility   102.00% 102.00% 102.00%