Consolidated Statements of Financial Condition Parentheticals - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021
Investment securities
Held-to-maturity, Fair Value	$ 6,109	$ 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)	5,977,368	5,837,071
Common Stock, Shares Outstanding (in shares)	3,473,565	3,333,268
Treasury Stock	2,503,803	2,503,803
Series D Preferred Stock
Series D Convertible Preferred Stock, Liquidation Preference (in dollars per share)	$ 1,000	$ 1,000
Series D Convertible Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Series D Convertible Preferred Stock, Shares Issued (in shares)	16,501	17,601
Series D Convertible Preferred Stock, Shares Outstanding (in shares)	16,501	17,601
Series E Preferred Stock
Series D Convertible Preferred Stock, Liquidation Preference (in dollars per share)	$ 1,000	$ 1,000
Series D Convertible Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Series D Convertible Preferred Stock, Shares Issued (in shares)	3,177	3,177
Series D Convertible Preferred Stock, Shares Outstanding (in shares)	3,177	3,177
Series F Preferred Stock
Series D Convertible Preferred Stock, Liquidation Preference (in dollars per share)	$ 1,000	$ 1,000
Series D Convertible Preferred Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Series D Convertible Preferred Stock, Shares Issued (in shares)	5,000	5,000
Series D Convertible Preferred Stock, Shares Outstanding (in shares)	5,000	5,000