v3.7.0.1
Stock-Based Compensation Expense - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Software Development [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Capitalized software development costs excluded from stock based compensation $ 338 $ 193