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Stock-Based Awards - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jun. 20, 2016
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]      
Stock option issuance period   10 years  
Option vested period   1 year  
Option issued period   Options may be issued for terms of ten years  
Shares of common stock authorized to issue under equity award plan 10,000,000    
Description of new equity award plan   On June 20, 2016, the Company's stockholders approved a new equity award plan under which the Company can issue up to 10,000,000 shares of common stock (less one share for every share granted under prior plans since March 31, 2016 and inclusive of shares available under the prior plans as of March 31, 2016) in the form of stock options and other stock-based awards.  
Stock-based compensation expense   $ 3,421 $ 3,503