Annual report pursuant to Section 13 and 15(d)

Share-based Compensation - Summary of Activity Relating to Company's ESPP Program (Detail)

v3.3.1.900
Share-based Compensation - Summary of Activity Relating to Company's ESPP Program (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Shares of stock sold to employees 98,070 0
Compensation expense $ 40,233 $ 0
Weighted average fair value per ESPP award $ 2.73