Consolidated Statements of Comprehensive Income (Loss) (Restated) (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Statement Of Income and Comprehensive Income [Abstract]
Net Income (Loss)	[1]	$ 74	$ (5)
Unrealized holding gains (losses) on available-for-sale securities
Unrealized holding gains (losses) arising during the period	[1]	(118)	15
Net unrealized gain (loss) on available for sale securities	[1]	(118)	15
Other comprehensive income (loss), before tax	[1]	(118)	15
Tax effect	[1]	(26)	5
Other comprehensive income (loss), net of tax	[1]	(92)	10
Comprehensive income (loss)	[1]	(18)	5
Tax Effect Allocated to Each Component of Other Comprehensive Income
Unrealized holding gains (losses) arising during the period	[1]	(26)	5
Income tax effect related to other comprehensive income (loss)	[1]	$ (26)	$ 5

[1] Restated