Investment Securities Text Tags (Details)	3 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2021 USD ($)
Schedule of Investments [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	12		15
Debt Securities, Available-for-sale	$ 86,039,000		$ 86,507,000
Percentage Available-for-sale Securities	93.70%
Debt Securities, Held-to-maturity	$ 5,833,000		$ 7,807,000
Percentage Held-to-maturity Securities	6.30%
Trading	$ 0
Proceeds from Sale of Available-for-sale Securities	$ 0	$ 30,190,000
Mortgage-backed securities
Schedule of Investments [Line Items]
Percentage Available-for-Sale, Continuos Unrealized Loss Position	53.70%
Number of AFS securities in Unrealized Loss Positions, greater than or equal to 12 months	1
Debt Securities, Held-to-maturity	$ 5,833,000
US Government Agency Securities
Schedule of Investments [Line Items]
Percentage Available-for-Sale, Continuos Unrealized Loss Position	24.80%
Number of AFS securities in Unrealized Loss Positions, greater than or equal to 12 months	3
Municipal Securities
Schedule of Investments [Line Items]
Percentage Available-for-Sale, Continuos Unrealized Loss Position	14.40%