Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Share-based Compensation - Unrecognized Share-Based Compensation Expense (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 4,306
Average Expected Recognition Period 1 year 10 months 24 days
Restricted stock awards  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 4,306
Average Expected Recognition Period 1 year 10 months 24 days