Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Commercial and Industrial [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired loans, average recorded investment	$ 2,643	$ 1,488	$ 2,687	$ 4,337
Impaired loans, interest income recognized	15	21	70	80
Real Estate Construction [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired loans, average recorded investment	3,850	446	3,499	616
Impaired loans, interest income recognized	58		95
Residential Real Estate Mortgage [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired loans, average recorded investment	5,274	2,872	4,937	574
Impaired loans, interest income recognized	69	61	143	33
Commercial Real Estate Mortgage [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired loans, average recorded investment	6,669	2,124	6,018	3,762
Impaired loans, interest income recognized	106	98	216	35
Consumer Installment [Member]
Note 7 - Loans And Related Allowance For Loan Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired loans, average recorded investment	14	27	18
Impaired loans, interest income recognized	$ 1		$ 1