Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Stock-Based Compensation - Restricted Stock Units - Additional Information (Detail)
$ in Millions
6 Months Ended
Jun. 30, 2017
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized stock-based compensation expense, expected recognition weighted-average period 3 years 1 month 6 days
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 $ 7.4
Unrecognized stock-based compensation expense, expected recognition weighted-average period 5 years 4 months 24 days