Fair Value Measurements, Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
FINANCIAL ASSETS [Abstract]
Available-for-sale securities	$ 6,996		$ 6,696
Mortgage servicing rights	3,039	$ 3,026	3,249	$ 3,226	$ 3,271	$ 3,028
Carrying Value [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	55,275		48,264
Available-for-sale securities	6,996		6,696
Loans held for sale	2,424		2,091
Loans, net	472,207		454,833
Accrued interest receivable	1,630		1,608
Mortgage servicing rights	3,039		3,249
FHLB Stock	2,146		2,212
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	303,478		271,144
Time deposits	160,005		168,880
Borrowings	37,453		40,435
Accrued interest payable	62		72
Estimated Fair Value [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	55,275		48,264
Available-for-sale securities	6,996		6,696
Loans held for sale	2,424		2,091
Loans, net	471,170		454,854
Accrued interest receivable	1,630		1,608
Mortgage servicing rights	3,039		3,249
FHLB Stock	2,146		2,212
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	303,022		271,144
Time deposits	160,042		168,091
Borrowings	37,451		40,421
Accrued interest payable	62		72
Estimated Fair Value [Member] | Level 1 [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	55,275		48,264
Available-for-sale securities	0		0
Loans held for sale	0		0
Loans, net	0		0
Accrued interest receivable	1,630		1,608
Mortgage servicing rights	0		0
FHLB Stock	0		0
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	0		0
Time deposits	0		0
Borrowings	0		0
Accrued interest payable	0		0
Estimated Fair Value [Member] | Level 2 [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	0		0
Available-for-sale securities	6,641		6,268
Loans held for sale	2,424		2,091
Loans, net	0		0
Accrued interest receivable	0		0
Mortgage servicing rights	0		0
FHLB Stock	0		0
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	303,022		271,144
Time deposits	160,042		168,091
Borrowings	37,451		40,421
Accrued interest payable	62		72
Estimated Fair Value [Member] | Level 3 [Member]
FINANCIAL ASSETS [Abstract]
Cash and cash equivalents	0		0
Available-for-sale securities	355		428
Loans held for sale	0		0
Loans, net	471,170		454,854
Accrued interest receivable	0		0
Mortgage servicing rights	3,039		3,249
FHLB Stock	2,146		2,212
FINANCIAL LIABILITIES [Abstract]
Non-maturity deposits	0		0
Time deposits	0		0
Borrowings	0		0
Accrued interest payable	$ 0		$ 0