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Note 4 - Loans and Allowance for Loan Losses (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)			$ 44,000	$ (687,000)
Allowance for Loan and Lease Losses, Write-offs			1,422	$ 0
Financing Receivable, Modifications, Recorded Investment	$ 14,810,000	$ 18,097,000	14,810,000		$ 18,097,000
Impaired Financing Receivable, Related Allowance	2,093,000	3,412,000	2,093,000		3,412,000
Loans and Leases Receivable, Impaired, Commitment to Lend	1,919,000	1,871,000	$ 1,919,000		1,871,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts			0	0
Minimum Loan Balance for Loans Evaluated by Risk Categories	500,000		$ 500,000
Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment	$ 3,174,000	$ 4,257,000	3,174,000		4,257,000
Specific Reserves [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Write-offs			1,304,000
Troubled Debt Restructurings [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Period Increase (Decrease)					623,000
Allowance for Loan and Lease Losses, Write-offs					$ 0
Increase (Decrease) in Other Loans			$ (3,287,000)
Change in Troubled Debt Restructurings			18.20%
Percentage of Loan Portfolio	79.00%	77.00%	79.00%		77.00%
Impaired Financing Receivable, Related Allowance	$ 1,532,000	$ 2,998,000	$ 1,532,000		$ 2,998,000
Unsecured [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Percentage of Loan Portfolio	6.04%	5.66%	6.04%		5.66%
Residential Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Real Estate Acquired Through Foreclosure	$ 383,000	$ 368,000	$ 383,000		$ 368,000
Mortgage Loans in Process of Foreclosure, Amount	1,920,000	$ 1,692,000	1,920,000		1,692,000
Impaired Financing Receivable, Related Allowance	66,000		$ 66,000
Commercial Real Estate Portfolio Segment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Proceeds from Loans	3,156,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,025,000
Commercial Real Estate Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts		1
Financing Receivable, Modifications, Recorded Investment		$ 4,013,000			4,013,000
Commercial Real Estate Portfolio Segment [Member] | Additional Impairment [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Impaired Financing Receivable, Related Allowance		$ 1,340,000			$ 1,340,000

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