Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Additional Information (Detail)

v3.3.0.814
Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]          
Amortization expenses of intangible assets $ 488 $ 360 $ 1,134 $ 1,079 $ 1,422