Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Unearned ESOP Shares	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2018	$ 48	$ 75,571	$ 65,301	$ (1,686)	$ (1,344)	$ 137,890
Increase (Decrease) in Stockholders' Equity
Net income			4,266			4,266
Other comprehensive income (loss)					2,603	2,603
Stock repurchases		(1,604)				(1,604)
Cash dividends			(2,059)			(2,059)
Stock options exercised		206				206
Compensation expense on stock awards		36				36
Compensation expense on ESOP		131		77		208
Balance at Jun. 30, 2019	48	74,340	67,508	(1,609)	1,259	141,546
Balance at Mar. 31, 2019	48	75,663	66,441	(1,648)	(360)	140,144
Increase (Decrease) in Stockholders' Equity
Net income			2,098			2,098
Other comprehensive income (loss)					1,619	1,619
Stock repurchases		(1,423)				(1,423)
Cash dividends			(1,031)			(1,031)
Stock options exercised		16				16
Compensation expense on stock awards		23				23
Compensation expense on ESOP		61		39		100
Balance at Jun. 30, 2019	48	74,340	67,508	(1,609)	1,259	141,546
Balance at Dec. 31, 2019	47	72,155	70,037	(1,533)	1,142	141,848
Increase (Decrease) in Stockholders' Equity
Net income			2,247			2,247
Other comprehensive income (loss)					1,356	1,356
Stock repurchases		(1,197)				(1,197)
Cash dividends			(2,037)			(2,037)
Stock options exercised		258				258
Compensation expense on stock awards		68				68
Compensation expense on ESOP		107		77		184
Balance at Jun. 30, 2020	47	71,391	70,247	(1,456)	2,498	142,727
Balance at Mar. 31, 2020	47	71,288	70,140	(1,494)	769	140,750
Increase (Decrease) in Stockholders' Equity
Net income			1,137			1,137
Other comprehensive income (loss)					1,729	1,729
Cash dividends			(1,030)			(1,030)
Stock options exercised		16				16
Compensation expense on stock awards		41				41
Compensation expense on ESOP		46		38		84
Balance at Jun. 30, 2020	$ 47	$ 71,391	$ 70,247	$ (1,456)	$ 2,498	$ 142,727