Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Financial Assets
Available-for-sale Securities	$ 60,709	$ 59,011
Debt Securities, Held-to-maturity, Fair Value	11,909	13,497
Mortgage servicing rights	181	192
Fair Value, Inputs, Level 1
Financial Assets
Cash and cash equivalents	134,558	58,686
Restricted cash		0
Available-for-sale Securities	0	0
FHLB Stock	0	0
Debt Securities, Held-to-maturity, Fair Value	0	0
Loans receivable	0	0
Loans held-for-sale		0
Accrued interest receivable	0	0
Mortgage servicing rights	0	0
Other assets - Interest-bearing deposits	0	0
Financial Liabilities
Deposits	245,634	313,430
Advances from FHLB of New York	0	0
Other borrowed money	0	0
Accrued interest payable	0	0
Fair Value, Inputs, Level 2
Financial Assets
Cash and cash equivalents	0	0
Restricted cash		283
Available-for-sale Securities	60,276	58,608
FHLB Stock	1,768	2,171
Debt Securities, Held-to-maturity, Fair Value	11,909	13,497
Loans receivable	0	0
Loans held-for-sale		0
Accrued interest receivable	2,023	1,583
Mortgage servicing rights	0	0
Other assets - Interest-bearing deposits	971	985
Financial Liabilities
Deposits	290,174	235,472
Advances from FHLB of New York	24,970	29,994
Other borrowed money	14,565	18,896
Accrued interest payable	1,086	390
Fair Value, Inputs, Level 3
Financial Assets
Cash and cash equivalents	0	0
Restricted cash		0
Available-for-sale Securities	433	403
FHLB Stock	0	0
Debt Securities, Held-to-maturity, Fair Value	0	0
Loans receivable	469,382	543,929
Loans held-for-sale		944
Accrued interest receivable	0	0
Mortgage servicing rights	181	192
Other assets - Interest-bearing deposits	0	0
Financial Liabilities
Deposits	0	0
Advances from FHLB of New York	0	0
Other borrowed money	0	0
Accrued interest payable	0	0
Reported Value Measurement
Financial Assets
Cash and cash equivalents	134,558	58,686
Restricted cash		283
Available-for-sale Securities	60,709	59,011
FHLB Stock	1,768	2,171
Debt Securities, Held-to-maturity, Fair Value	12,075	13,435
Loans receivable	472,627	540,492
Loans held-for-sale		944
Accrued interest receivable	2,023	1,583
Mortgage servicing rights	181	192
Other assets - Interest-bearing deposits	971	985
Financial Liabilities
Deposits	586,883	579,176
Advances from FHLB of New York	25,000	30,000
Other borrowed money	13,403	19,403
Accrued interest payable	1,086	390
Estimate of Fair Value Measurement
Financial Assets
Cash and cash equivalents	134,558	58,686
Restricted cash		283
Available-for-sale Securities	60,709	59,011
FHLB Stock	1,768	2,171
Debt Securities, Held-to-maturity, Fair Value	11,909	13,497
Loans receivable	469,382	543,929
Loans held-for-sale		944
Accrued interest receivable	2,023	1,583
Mortgage servicing rights	181	192
Other assets - Interest-bearing deposits	971	985
Financial Liabilities
Deposits	535,808	548,902
Advances from FHLB of New York	24,970	29,994
Other borrowed money	14,565	18,896
Accrued interest payable	$ 1,086	$ 390