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Borrowings (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Debt Instrument [Line Items]
Long-term debt outstanding	$ 72,068,000	$ 83,516,000	$ 84,725,000
FHLB Advances
Debt Instrument [Line Items]
Long-term debt outstanding	$ 64,216,000	75,216,000
Weighted average rate percentage	2.54%
Trust preferred subordinated debt
Debt Instrument [Line Items]
Long-term debt outstanding	$ 5,000,000	5,000,000
Interest rate percentage	6.39%
Trust preferred subordinated debt issued	$ 5,000,000
Loan payable to local bank, 4.5% | Loan payable to local bank
Debt Instrument [Line Items]
Long-term debt outstanding	$ 1,952,000	2,300,000
Interest rate percentage	4.50%
Period of fixed interest rate	5 years
Loan payable to local bank, 5.25% | Loan payable to local bank
Debt Instrument [Line Items]
Long-term debt outstanding	$ 900,000	$ 1,000,000
Loan payable to local bank, 5.25% | Loan payable to local bank | Wall Street Journal Prime Rate
Debt Instrument [Line Items]
Basis spread on prime rate, percentage	0.25%
Effective rate, percentage	4.75%

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