Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Stock Options - Additional Information (Detail)

v3.19.3
Stock-Based Compensation - Stock Options - Additional Information (Detail)
$ in Millions
9 Months Ended
Sep. 30, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized stock-based compensation expense related to non-vested stock options $ 14.9
Employee Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized stock-based compensation expense, expected recognition weighted-average period 58 months
2017 Omnibus Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options priced at fair market value, percent 100.00%
Stock option expiration period 10 years
Stock option, vesting period 6 years
Weighted average remaining contractual term 8 years 1 month 6 days
Aggregate intrinsic value of options outstanding and exercisable $ 2.1