Non-interest Revenue and Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Advertising	$ 281	$ 316
Legal expense	611	413
Insurance and surety	621	660
Audit expense	537	672
Outsourced service	304	558
Data lines / internet	412	441
Retail expenses	733	781
Operating chargeoffs and other losses	0	714
Regulatory assessment	209	314
Director's fees	331	313
Other	1,567	2,216
Other	$ 5,606	$ 7,398