Loans and Allowance for Loan Losses (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Analysis of changes in the allowance for loan losses
Balance at beginning of period	$ 4,465	$ 4,198
Loan charge-offs	(37)	(87)
Recoveries	59	54
Net loan recoveries (charge-offs)	22	(33)
Provision charged to operations	600	175
Balance at end of period	5,087	4,340
Commercial
Analysis of changes in the allowance for loan losses
Balance at beginning of period	1,756	1,232
Loan charge-offs	(1)
Recoveries	19	28
Net loan recoveries (charge-offs)	18	28
Provision charged to operations	77	318
Balance at end of period	1,851	1,578
Commercial real estate
Analysis of changes in the allowance for loan losses
Balance at beginning of period	2,130	2,414
Provision charged to operations	464	(213)
Balance at end of period	2,594	2,201
Residential real estate
Analysis of changes in the allowance for loan losses
Balance at beginning of period	334	314
Loan charge-offs		(29)
Recoveries	25
Net loan recoveries (charge-offs)	25	(29)
Provision charged to operations	42	35
Balance at end of period	401	320
Consumer | Home equity
Analysis of changes in the allowance for loan losses
Balance at beginning of period	104	115
Provision charged to operations	(1)	(1)
Balance at end of period	103	114
Consumer | Other
Analysis of changes in the allowance for loan losses
Balance at beginning of period	141	123
Loan charge-offs	(36)	(58)
Recoveries	15	26
Net loan recoveries (charge-offs)	(21)	(32)
Provision charged to operations	18	36
Balance at end of period	$ 138	$ 127