Fair Value of Financial Instruments, Assets, Balance Sheet Grouping (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Assets [Abstract]
AFS Securities	$ 9,029		$ 11,978
HTM securities	30,459		38,212
Right-of use assets for operating leases	2,534
Liabilities [Abstract]
Lease liabilities	2,572
Assets or liabilities transferred between levels 1, 2 and 3	0	$ 0	0
Bank Commitments [Member]
Liabilities [Abstract]
Loan funding commitments	120,400		115,000
Standby Letters of Credit [Member]
Liabilities [Abstract]
Loan funding commitments	3,600		3,300
Carrying Value [Member]
Assets [Abstract]
Cash and cash equivalents	65,253		188,340
Certificates of deposit held as investment	7,540		8,780
AFS Securities	9,029		11,978
HTM securities	30,302		38,912
LHFS	17,587		9,686
Loans receivable, net	653,448		674,305
Restricted stock investments	2,431		3,766
Accrued interest receivable	2,514		2,848
Right-of use assets for operating leases	2,534
MSRs	316		437
IRLCs	180		100
Mandatory forward contracts	46
Best effort forward contracts	26
Liabilities [Abstract]
Deposits	657,154		779,506
Accrued interest payable	332		419
Borrowings	38,498		73,500
Subordinated debentures	20,619		20,619
Lease liabilities	2,572
Mandatory forward contracts			16
Total [Member]
Assets [Abstract]
Cash and cash equivalents	65,253		188,340
Certificates of deposit held as investment	7,540		8,780
AFS Securities	9,029		11,978
HTM securities	30,459		38,212
LHFS	17,587		9,686
Loans receivable, net	679,547		670,512
Restricted stock investments	2,431		3,766
Accrued interest receivable	2,514		2,848
Right-of use assets for operating leases	2,534
MSRs	316		437
IRLCs	180		100
Mandatory forward contracts	46
Best effort forward contracts	26
Liabilities [Abstract]
Deposits	660,174		778,313
Accrued interest payable	332		419
Borrowings	35,022		69,210
Subordinated debentures	20,619		20,619
Lease liabilities	2,572
Mandatory forward contracts			16
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	65,253		188,340
Certificates of deposit held as investment	7,540		8,780
AFS Securities	999		1,981
HTM securities	2,010		2,008
Level 2 [Member]
Assets [Abstract]
AFS Securities	8,030		9,997
HTM securities	28,449		36,204
LHFS	17,587		9,686
Restricted stock investments	2,431		3,766
Accrued interest receivable	2,514		2,848
Right-of use assets for operating leases	2,534
Mandatory forward contracts	46
Best effort forward contracts	26
Liabilities [Abstract]
Deposits	660,174		778,313
Accrued interest payable	332		419
Borrowings	35,022		69,210
Lease liabilities	2,572
Mandatory forward contracts			16
Level 3 [Member]
Assets [Abstract]
Loans receivable, net	679,547		670,512
MSRs	316		437
IRLCs	180		100
Liabilities [Abstract]
Subordinated debentures	$ 20,619		$ 20,619