Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Stock-Based Compensation - Stock Options - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-based compensation expense $ 1,556 $ (68)
2017 Omnibus Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock option expiration period 10 years  
Stock option, vesting period 6 years  
Aggregate intrinsic value of options outstanding and exercisable $ 23,300  
Weighted average remaining contractual term 8 years  
Stock-based compensation expense $ 800 $ 100
2017 Omnibus Plan [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options priced at fair market value, percent 100.00%