Borrowed Money Text Tag (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2017	Mar. 31, 2003	Sep. 17, 2003
Debt Disclosure [Abstract]
Borrowing limit from FHLB % of assets	30.00%
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	$ 173,600
Federal Home Loan Bank of New York (“FHLB-NY”) stock, at cost	568	$ 926
Loans Pledged as Collateral	60,400
Financial Instruments, Owned and Pledged as Collateral, at Fair Value	21,000
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds	68,900
Accrued interest FHLB		2
Interest Expense, Federal Home Loan Bank and Federal Reserve Bank Advances, Long-term	$ 176	89
subordinated debt issued shares (in shares)					13,000
Liquidation amount subordinated debt (in dollars per share)					$ 1,000
Proceeds from Issuance of Long-term Debt				$ 13,000
Proceeds from (Payments for) Other Financing Activities				400
Payments for Repurchase of Trust Preferred Securities				$ 13,400
Debt Instrument, Basis Spread on Variable Rate	3.05%
Decrease in Subordinated Debt Interest Payable			$ 2,500
Accrued interest expense subordinated debt	$ 2,500	1,700
Interest Expense, Subordinated Notes and Debentures	$ 815	$ 820