Loans and Allowance for Loan Losses (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Analysis of changes in the allowance for loan losses
Balance at beginning of period	$ 4,485	$ 4,095	$ 4,198	$ 4,578
Loan charge-offs	(37)	(49)	(175)	(1,289)
Recoveries	13	31	83	213
Net loan recoveries (charge-offs)	(24)	(18)	(92)	(1,076)
Provision charged to operations	180	75	535	650
Balance at end of period	4,641	4,152	4,641	4,152
Commercial
Analysis of changes in the allowance for loan losses
Balance at beginning of period	1,717	1,394	1,232	1,591
Loan charge-offs				(1,163)
Recoveries			28
Net loan recoveries (charge-offs)			28	(1,163)
Provision charged to operations	84	(123)	541	843
Balance at end of period	1,801	1,271	1,801	1,271
Commercial real estate
Analysis of changes in the allowance for loan losses
Balance at beginning of period	2,165	2,457	2,414	2,702
Recoveries		16		166
Net loan recoveries (charge-offs)		16		166
Provision charged to operations	94	128	(155)	(267)
Balance at end of period	2,259	2,601	2,259	2,601
Residential real estate
Analysis of changes in the allowance for loan losses
Balance at beginning of period	368	80	314	117
Loan charge-offs			(29)
Recoveries				1
Net loan recoveries (charge-offs)			(29)	1
Provision charged to operations	(23)	25	60	(13)
Balance at end of period	345	105	345	105
Consumer | Home equity
Analysis of changes in the allowance for loan losses
Balance at beginning of period	98	66	115	70
Recoveries	1	1	2	5
Net loan recoveries (charge-offs)	1	1	2	5
Provision charged to operations	2	(1)	(16)	(9)
Balance at end of period	101	66	101	66
Consumer | Other
Analysis of changes in the allowance for loan losses
Balance at beginning of period	137	98	123	98
Loan charge-offs	(37)	(49)	(146)	(126)
Recoveries	12	14	53	41
Net loan recoveries (charge-offs)	(25)	(35)	(93)	(85)
Provision charged to operations	23	46	105	96
Balance at end of period	$ 135	$ 109	$ 135	$ 109