Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deposits
Passbook Savings	$ 2,691	$ 3,085
Money Market Accounts	106	102
Certificates of Deposit	55,248	52,996
Deposits	$ 58,045	$ 56,183
Percentage of deposits
Passbook Savings (percentage)	4.60%	5.50%
Money Market Accounts (percentage)	0.20%	0.20%
Certificates of Deposit (percentage)	95.20%	94.30%
Deposits (percentage)	100.00%	100.00%
Weighted average interest rate on deposits	1.91%	1.97%