Fair Value of Assets and Liabilities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Sep. 30, 2020 USD ($) loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of impaired loans, with related allowance | loan	2	0
Valuation allowance	$ 417,000
Impaired Loans, Cumulative Charge-Offs	0
Impaired Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ 1,584,000	$ 0