XML 60 R49.htm IDEA: XBRL DOCUMENT v3.21.1
Share-Based Compensation - Schedule of Grant Date Fair Values of Awards Using Monte Carlo Simulation Valuation Model (Detail)
3 Months Ended
Mar. 31, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Expected volatility 60.00% [1]
Risk-free rate 0.20%
Expected term 3 years
[1] The weighted average expected volatility was 60.0%.