Other Non-interest Revenue and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Noninterest Income, Other [Abstract]
Compliance fee	$ 0	$ 78	$ 0	$ 78
Correspondent banking fees	965	7	2,454	687
Other	177	57	267	153
Total non-interest income	1,142	142	2,721	918
Non-interest expense:
Advertising	133	119	412	189
Legal expense	285	93	612	355
Insurance and surety	253	232	631	565
Audit expense	425	138	674	413
Data lines / internet	94	109	307	318
Retail expenses	115	216	602	607
Loss contingency	(770)	0	1,203	0
Director's fees	131	85	273	255
Other	704	467	2,030	1,555
Total non-interest expense	$ 1,370	$ 1,459	$ 6,744	$ 4,257