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Note 4 - Loans and Allowance for Loan Losses (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Mar. 31, 2013
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Allowance for Loan and Lease Losses, Write-offs	$ 513	$ 536,000
Allowance for Loan and Lease Losses, Period Increase (Decrease)	233,000	2,169,000
Allowance for Loan and Lease Losses, Adjustments, Net	503
Proceeds from Recoveries of Loans Previously Charged off	275,000
Change in Troubled Debt Restructurings		34.10%
Financing Receivable, Modifications, Recorded Investment	11,178,000	16,954,000
Troubled Debt Payments Recieved	995
Change In Troubled Debt Restructurings, Payoff Amount			300
Impaired Financing Receivable, Related Allowance	878	1,979,000
Other Commitment		109,000	724,000
Minimum Loan Balance for Loans Evaluated by Risk Categories	500,000
Commercial Real Estate [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Financing Receivable, Modifications, Recorded Investment		4,222
Troubled Debt Restructurings [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Increase (Decrease) in Other Loans	5,776,000
Impaired Financing Receivable, Related Allowance		$ 2,107,000	$ 1,599,000
Commercial and Industrial [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts	1
Unsecured [Member]
Note 4 - Loans and Allowance for Loan Losses (Details) [Line Items]
Percentage of Loan Portfolio	5.14%	4.87%

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