Components of Accumulated Other Comprehensive Loss Included in Stockholders' Equity (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Comprehensive Income (Loss) [Line Items]
Net unrealized loss on securities available-for-sale	$ (1)	$ (14)
Net unrealized loss for funded status of defined benefit plan liability	(261)	(261)
Accumulated other comprehensive income (Loss), before taxes, total	(262)	(275)
Tax effect	89	94
Net-of-tax amount	$ (173)	$ (181)