Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Restricted Stock Units - Additional Information (Detail)

v3.19.3.a.u2
Stock-Based Compensation - Restricted Stock Units - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
2017 Omnibus Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 6 years
Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized stock-based compensation expense related to restricted stock units $ 3.0
Unrecognized stock-based compensation expense, expected recognition weighted-average period 45 months
Restricted Stock Units [Member] | 2017 Omnibus Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 5 years