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Disclosures about Fair Value Measurements and Financial Instruments - Schedule of assets measured and recorded at fair value on a non-recurring basis (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Impaired loan with carrying value	$ 266,000	$ 263,000
Specific valuation allowance	8,000	8,000
Impaired loans	258,000	255,000
Fair Value Measurements, Nonrecurring Basis
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Impaired loans	258,000	255,000
Other real estate owned	40,000	37,000
Fair Value Measurements, Nonrecurring Basis | Impaired loans
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Impaired loans	258,000	$ 255,000
Appraisal adjustments		0.00%
Fair Value Measurements, Nonrecurring Basis | Other real estate owned
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Other real estate owned	$ 40,000	$ 37,000
Valuation Techniques	Appraisal of collateral
Appraisal adjustments	57.00%
Fair Value Measurements, Nonrecurring Basis | Minimum | Impaired loans
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Appraisal adjustments	0.00%
Fair Value Measurements, Nonrecurring Basis | Minimum | Other real estate owned
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Appraisal adjustments		0.00%
Liquidation expenses	22.00%	21.00%
Fair Value Measurements, Nonrecurring Basis | Maximum | Impaired loans
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Appraisal adjustments	100.00%	100.00%
Fair Value Measurements, Nonrecurring Basis | Maximum | Other real estate owned
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Appraisal adjustments		57.00%
Liquidation expenses	38.00%	134.00%
Fair Value Measurements, Nonrecurring Basis | Wgtd Ave | Impaired loans
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Appraisal adjustments	3.00%	3.00%
Fair Value Measurements, Nonrecurring Basis | Wgtd Ave | Other real estate owned
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Appraisal adjustments	57.00%	38.00%
Liquidation expenses	30.00%	30.00%
Fair Value Measurements, Nonrecurring Basis | Level 3 | Impaired loans
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Impaired loans	$ 258,000	$ 255,000
Other real estate owned	$ 40,000
Valuation Techniques	Appraisal of collateral	Appraisal of collateral
Fair Value Measurements, Nonrecurring Basis | Level 3 | Other real estate owned
DISCLOSURES ABOUT FAIR VALUE MEASUREMENTS
Other real estate owned		$ 37,000
Valuation Techniques		Appraisal of collateral

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Description of the valuation processes in place for fair value measurements categorized within Level 3 of the fair value hierarchy.

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Fair value of firm holdings in securities classified as other. Includes pledged and unpledged holdings.

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