Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plan - Schedule of Weighted-Average Assumptions Used to Estimate Fair Value of Stock Options and Restricted Stock Awards using Black-Scholes Option Valuation Model (Detail)

v3.20.1
Stock Incentive Plan - Schedule of Weighted-Average Assumptions Used to Estimate Fair Value of Stock Options and Restricted Stock Awards using Black-Scholes Option Valuation Model (Detail)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Expected volatility 56.12% 41.84%
Expected dividends 16.27% 7.89%
Expected term (in years) 6 years 8 months 12 days 7 years 4 months 24 days
Risk-free interest rate 1.69% 2.93%