Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Detail)

v2.4.1.9
Intangible Assets - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]    
Amortization expenses of intangible assets $ 1,422us-gaap_AmortizationOfIntangibleAssets $ 1,521us-gaap_AmortizationOfIntangibleAssets