Deposits Deposits-Liabilities by Type (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Deposits, by Type
Non-interest-bearing demand	$ 62,905	$ 61,576
Interest-bearing checking	23,570	37,180
Non-interest bearing checking	102,550	100,913
Money market	101,990	140,807
Certificates of deposit	293,513	236,342
Mortgagors deposits	2,355	2,358
Total deposits	$ 586,883	$ 579,176
Percentage of Interest-bearing Domestic Deposit Liabilities to Deposit Liabilities
Percentage of Noninterest bearing demand deposits to deposits	10.72%	10.63%
Percentage of Interest-bearing Domestic Deposits to Deposits, Checking	4.02%	6.42%
Percentage of Interest-bearing Domestic Deposits to Deposits, Savings	17.47%	17.42%
Percentage of Interest-bearing Domestic Deposits to Deposits, Money Market	17.38%	24.31%
Percentage of Interest-bearing Domestic Deposits to Deposits, Certiificates of Deposits	50.01%	40.81%
Percentage of Interest-bearing Domestic Deposits to Deposits, Mortgagors deposits	0.40%	0.41%
Percent Total Deposits	100.00%	100.00%
Weighted Average Rate Domestic Deposit Liabilities
Weighted Average Rate Domestic Deposit, Demand	0.00%	0.00%
Weighted Average Rate Domestic Deposit, Checking	0.07%	0.14%
Weighted Average Rate Domestic Deposit, Savings	0.25%	0.27%
Weighted Average Rate Domestic Deposit, Money Market	0.48%	0.60%
Weighted Average Rate Domestic Deposit, Certificates of Deposits	1.25%	1.00%
Weighted Average Rate Domestic Deposit, Mortgagors Deposits	1.76%	1.79%
Weighted Average Rate, Interest-bearing Domestic Deposits, Point in Time	0.76%	0.61%