Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Assumptions Used to Value Market Based Performance Awards (Details)

v3.10.0.1
Stock-Based Compensation - Assumptions Used to Value Market Based Performance Awards (Details) - Market Based Performance Restricted Stock Units
9 Months Ended
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected volatility (as a percent) 89.50%
Risk-free interest rate (as a percent) 2.40%
Dividend yield (as a percent) 0.00%
Expected life (years) 2 years 9 months 7 days