Consolidated Balance Sheets (Restated) (Parenthenticals) - USD ($) $ in Thousands		Mar. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Fair value securities held to maturity (in dollars)	[1]	$ 6,356	$ 6,588
Preferred stock - par value (in dollars per share)	[1]	$ 0.01	$ 0.01
Preferred stock, shares authorized	[1]	25,000,000	25,000,000
Preferred stock, shares issued	[1]	0	0
Preferred stock, shares outstanding	[1]	0	0
Common stock - par value (in dollars per share)	[1]	$ 0.01	$ 0.01
Common stock, shares authorized	[1]	50,000,000	50,000,000
Common stock, shares issued	[1]	1,941,253	1,934,853
Common stock, shares outstanding	[1]	1,941,253	1,934,853

[1] Restated