Investment Securities, Maturities (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Available-for-Sale, Amortized Cost
Due within one year	$ 10,287,000
Due from one to five years	33,261,000
Due from five to ten years	21,669,000
Due after ten years	729,000
Amortized Cost Basis	65,946,000
Amortized Cost	152,443,000	$ 176,915,000
Available-for-Sale, Fair Value
Due within one year	10,327,000
Due from one to five years	34,293,000
Due from five to ten years	22,939,000
Due after ten years	717,000
Total available-for-sale, maturities	68,276,000
Fair Value	157,936,000	178,000,000
Held-to-Maturity, Amortized Cost
Due within one year	2,220,000
Due from one to five years	7,223,000
Due from five to ten years	2,090,000
Due after ten years	15,408,000
Amortized Cost	26,941,000	27,525,000
Held-to-Maturity, Fair Value
Due within one year	2,227,000
Due from one to five years	7,268,000
Due from five to ten years	2,109,000
Due after ten years	15,673,000
Held-to-maturity, fair value	27,277,000	27,888,000
Available-for-sale securities pledged as collateral	135,819,000	123,009,000
U.S. Agency mortgage-backed securities [Member]
Available-for-Sale, Amortized Cost
Amortized Cost	86,497,000	83,977,000
Available-for-Sale, Fair Value
Fair Value	89,660,000	$ 84,406,000
Held-to-Maturity, Amortized Cost
Amortized Cost	0
Held-to-Maturity, Fair Value
Held-to-maturity, fair value	$ 0