Other Non-interest Revenue and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Noninterest Income, Other [Abstract]
Correspondent banking fees	$ 0	$ 143	$ 0	$ 143
Other	131	103	225	138
Total non-interest income	131	246	225	281
Non-interest expense:
Advertising	165	111	234	264
Legal expense	247	112	340	183
Insurance and surety	309	289	618	585
Audit expense	165	148	331	299
Data lines / internet	104	99	210	194
Security services	7	75	26	149
Retail expenses	284	250	570	467
Operating charge-offs and other losses	100	23	139	34
Director's fees	106	123	211	246
Other	657	612	1,255	1,179
Total non-interest expense	$ 2,144	$ 1,842	$ 3,934	$ 3,600