Consolidated Statements of Financial Condition Parentheticals - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Investment securities
Held-to-maturity, Fair Value	$ 5,592	$ 8,140
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	10,000,000	10,000,000
Common Stock, Shares Issued (in shares)	6,288,922	5,837,071
Common Stock, Shares Outstanding (in shares)	3,785,319	3,333,268
Treasury Stock	2,503,803	2,503,803
Series D Preferred Stock
Convertible Preferred Stock, Liquidation Preference (in dollars per share)	$ 1,000	$ 1,000
Convertible Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Convertible Preferred Stock, Shares Issued (in shares)	14,851	17,601
Convertible Preferred Stock, Shares Outstanding (in shares)	14,851	17,601
Series E Preferred Stock
Convertible Preferred Stock, Liquidation Preference (in dollars per share)	$ 1,000	$ 1,000
Convertible Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Convertible Preferred Stock, Shares Issued (in shares)	3,177	3,177
Convertible Preferred Stock, Shares Outstanding (in shares)	3,177	3,177
Series F Preferred Stock
Convertible Preferred Stock, Liquidation Preference (in dollars per share)	$ 1,000	$ 1,000
Convertible Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Convertible Preferred Stock, Shares Issued (in shares)	9,000	5,000
Convertible Preferred Stock, Shares Outstanding (in shares)	9,000	5,000