Other Non-interest Revenue and Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Noninterest Income, Other [Abstract]
Correspondent banking fees	$ 79	$ 0
Other	83	46
Total non-interest income	162	46
Non-interest expense:
Advertising	25	93
Contributions	84	8
Legal expense	70	98
Insurance and surety	158	144
Audit expense	138	126
Outsourced service	25	156
Data lines / internet	112	108
Retail expenses	184	200
Director's fees	85	77
Other	518	544
Total non-interest expense	$ 1,399	$ 1,554