Note 7 - Loans And Related Allowance For Loan Losses (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Note 7 - Loans And Related Allowance For Loan Losses (Details) [Line Items]
Number of Days Past Due	90
Loans and Leases Receivable, Allowance	$ 7,749,000	$ 7,779,000	$ 7,752,000
Shift From Commercial and Industrial Specific Reserve	660,000
One to Four Owner Occupied Loss Ratio			1.25%	0.94%
Threshold for Loans Evaluated for Impairment [Member] | Outside Consultant [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) [Line Items]
Loans and Leases Receivable, Gross, Commercial	250,000
Threshold for Loans Evaluated for Impairment [Member] | Criticized Relationships [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) [Line Items]
Financing Receivable, Gross	125,000
Threshold for Loans Evaluated for Impairment [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) [Line Items]
Notes, Loans and Financing Receivable, Gross, Current	150,000
Loans and Leases Receivable, Gross, Commercial	200,000
Commercial and Industrial [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) [Line Items]
Loans and Leases Receivable, Allowance	875,000	1,700,000	1,626,000
Residential Real Estate Mortgage [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) [Line Items]
Loans and Leases Receivable, Allowance	$ 3,600,000	$ 2,900,000	$ 4,109,000