Goodwill and Intangible Assets - Additional Information (Detail) $ in Thousands	Sep. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expenses of intangible assets, 2016	$ 525
Amortization expenses of intangible assets, 2017	518
Amortization expenses of intangible assets, 2018	495
Amortization expenses of intangible assets, 2019	495
Amortization expenses of intangible assets, 2020	274
Amortization expenses of intangible assets, After 2020	$ 288