Fair Value of Financial Instruments, Assets, Balance Sheet Grouping (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Assets [Abstract]
AFS Securities - U.S. government agency notes	$ 11,975		$ 10,119
HTM securities	45,432		54,004
Liabilities [Abstract]
Assets transfers level 1 to level 2 Transfers	0	$ 0	0
Liabilities transfers level 1 to level 2 Transfers	0	0	0
Assets transfers level 2 to level 1 Transfers	0	0	0
Liabilities transfers level 2 to level 1 Transfers	0	0	0
Assets transfers into level 3	0	0	0
Liabilities transfers into level 3	0	0	0
Assets transfers out of level 3	0	0	0
Liabilities transfers out of level 3	0	$ 0	0
Bank Commitments [Member]
Liabilities [Abstract]
Loan funding commitments	90,500		105,200
Standby Letters of Credit [Member]
Liabilities [Abstract]
Loan funding commitments	9,200		3,500
Carrying Value [Member]
Assets [Abstract]
Cash and cash equivalents	22,165		21,853
Certificates of deposit held as investment	8,780		8,780
AFS Securities - U.S. government agency notes	11,975		10,119
HTM securities	46,487		54,303
LHFS	9,444		4,530
Loans receivable, net	678,655		660,096
Restricted stock investments	4,227		4,489
Accrued interest receivable	2,604		2,640
MSRs	501		477
IRLCs	168		22
Mandatory forward contracts	26		13
Best effort forward contracts	12		3
Liabilities [Abstract]
Deposits	621,615		602,228
Borrowings	425		395
Subordinated debentures	82,000		88,500
Accrued interest payable	20,619		20,619
Total [Member]
Assets [Abstract]
Cash and cash equivalents	22,165		21,853
Certificates of deposit held as investment	8,780		8,780
AFS Securities - U.S. government agency notes	11,975		10,119
HTM securities	45,432		54,004
LHFS	9,444		4,530
Loans receivable, net	677,594		672,349
Restricted stock investments	4,227		4,489
Accrued interest receivable	2,604		2,640
MSRs	501		477
IRLCs	168		22
Mandatory forward contracts	26		13
Best effort forward contracts	12		3
Liabilities [Abstract]
Deposits	613,690		594,659
Borrowings	425		395
Subordinated debentures	75,032		81,303
Accrued interest payable	20,619		20,619
Level 1 [Member]
Assets [Abstract]
Cash and cash equivalents	22,165		21,853
Certificates of deposit held as investment	8,780		8,780
AFS Securities - U.S. government agency notes	1,973
HTM securities	5,013		5,056
Level 2 [Member]
Assets [Abstract]
AFS Securities - U.S. government agency notes	10,002		10,119
HTM securities	40,419		48,948
LHFS	9,444		4,530
Restricted stock investments	4,227		4,489
Accrued interest receivable	2,604		2,640
Mandatory forward contracts	26		13
Best effort forward contracts	12		3
Liabilities [Abstract]
Deposits	613,690		594,659
Borrowings	425		395
Subordinated debentures	75,032		81,303
Level 3 [Member]
Assets [Abstract]
Loans receivable, net	677,594		672,349
MSRs	501		477
IRLCs	168		22
Liabilities [Abstract]
Accrued interest payable	$ 20,619		$ 20,619