Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Loans receivable, allowance for loans	$ 4,536	$ 4,826
Deferred loan fees	$ 419	$ 443
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	7,990,867	7,976,131
Common stock, shares outstanding	6,648,887	6,637,771
Treasury stock, shares	1,341,980	1,338,360
Unearned ESOP shares	382,691	434,548