Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Unrecognized Share-Based Compensation Expense (Detail)

v3.19.1
Share-Based Compensation - Unrecognized Share-Based Compensation Expense (Detail)
3 Months Ended
Mar. 31, 2019
USD ($)
Stock option awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 0
Restricted stock awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 3,315,000
Average Expected Recognition Period 1 year 9 months 18 days