Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities, Commitments and Off-Balance Sheet Arrangements (Details) - USD ($)		6 Months Ended
		Jun. 30, 2020	Dec. 31, 2019
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Period of home equity loans available to the borrower		10 years
Reserve for losses		$ 2,900,000	$ 921,000
Maximum [Member]
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Period of commitments for loans extended to customers		90 days
Period of construction loans available to the borrower		1 year
Commitments to Extend Credit Under Amortizing Loans [Member]
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Off-balance sheet risks asset amount	[1]	$ 16,775,000	13,389,000
Probable losses		0	0
Commitments to Extend Credit Under Home Equity Lines of Credit [Member]
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Off-balance sheet risks asset amount	[2]	13,570,000	13,776,000
Probable losses		0	0
Unused Portion of Construction Loans [Member]
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Off-balance sheet risks asset amount	[3]	76,156,000	90,439,000
Unused Portion of Business Lines of Credit [Member]
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Off-balance sheet risks asset amount		22,803,000	14,623,000
Standby Letters of Credit [Member]
Fair Value, Off-Balance Sheet Arrangements, and Contingent Loss [Abstract]
Off-balance sheet risks liability amount		874,000	885,000
Probable losses		$ 0	$ 0

[1] Commitments for loans are extended to customers for up to 90 days after which they expire. Excludes commitments to originate loans held for sale, which are discussed in the following footnote.

[2] Unused portions of home equity loans are available to the borrower for up to 10 years.

[3] Unused portions of construction loans are available to the borrower for up to one year.