Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial and Industrial [Member]
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired Financing Receivable - Average Recorded Investment	$ 2,117	$ 2,643	$ 2,140	$ 2,687
Impaired Financing Receivable - Interest Income Recognized	12	15	49	70
Real Estate Construction [Member]
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired Financing Receivable - Average Recorded Investment	3,653	3,850	3,683	3,499
Impaired Financing Receivable - Interest Income Recognized	40	58	81	95
Residential Real Estate Mortgage [Member]
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired Financing Receivable - Average Recorded Investment	5,153	5,274	5,229	4,937
Impaired Financing Receivable - Interest Income Recognized	45	69	102	143
Commercial Real Estate Mortgage [Member]
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired Financing Receivable - Average Recorded Investment	5,387	6,669	5,758	6,018
Impaired Financing Receivable - Interest Income Recognized	83	106	158	216
Consumer Installment [Member]
Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Additional Information on Impaired Loans [Line Items]
Impaired Financing Receivable - Average Recorded Investment	14	14	13	18
Impaired Financing Receivable - Interest Income Recognized		$ 1		$ 1