Securities - Amortized Cost and Fair Value (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost	$ 53,335
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	53,335
Amortized cost and fair values of securities
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost	53,739
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value	53,745
Available-for-sale Securities, Amortized Cost Basis	404
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	410
Mortgage - backed securities - residential [Member]
Amortized cost and fair values of securities
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	7,062
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	7,299
Collateralized mortgage obligations - residential [Member]
Amortized cost and fair values of securities
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost	2,840
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	$ 2,809

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