Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Amount
Federal income tax at statutory rate	$ 1,212	$ 1,396
State tax, net of federal benefit	469	498
Bank Owned Life Insurance	(116)	(81)
ESOP and stock-based compensation	20	(11)
Other	82	9
Income tax expense (benefit)	$ 1,667	$ 1,811
% of Pretax Income
Federal income tax at statutory rate	21.00%	21.00%
State tax, net of federal benefit	8.10%	7.50%
Bank Owned Life Insurance	(2.00%)	(1.20%)
ESOP and stock-based compensation	0.30%	(0.20%)
Other	1.50%	0.20%
Percentage of pretax income	28.90%	27.30%