Note 7 - Loans and Related Allowance for Loan and Lease Losses (Details) - Past Due Financing Receivables (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	$ 437,497	$ 422,165
Financing Receivable 30-59 Days Past Due	2,762	3,253
Financing Receivable 60-89 Days Past Due	992	1,595
Financing Receivable 90 Days + Past Due	117	181
Financing Receivable Total Past Due	3,871	5,029
Financing Receivable Non-Accrual	8,751	8,531
Financing Receivable	450,119	435,725
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	53,809	53,366
Financing Receivable 30-59 Days Past Due	703	521
Financing Receivable 60-89 Days Past Due	575	359
Financing Receivable 90 Days + Past Due	20	38
Financing Receivable Total Past Due	1,298	918
Financing Receivable Non-Accrual	469	214
Financing Receivable	55,577	54,498
Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	25,995	24,945
Financing Receivable 30-59 Days Past Due	620	17
Financing Receivable 60-89 Days Past Due		639
Financing Receivable 90 Days + Past Due	0	0
Financing Receivable Total Past Due	620	656
Financing Receivable	26,615	25,601
Residential Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	210,073	200,041
Financing Receivable 30-59 Days Past Due	1,283	2,079
Financing Receivable 60-89 Days Past Due	415	481
Financing Receivable 90 Days + Past Due	97	143
Financing Receivable Total Past Due	1,796	2,703
Financing Receivable Non-Accrual	7,360	7,566
Financing Receivable	219,229	210,310
Commercial Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	141,466	139,730
Financing Receivable 30-59 Days Past Due	130	598
Financing Receivable 60-89 Days Past Due		100
Financing Receivable 90 Days + Past Due	0	0
Financing Receivable Total Past Due	130	698
Financing Receivable Non-Accrual	909	743
Financing Receivable	142,505	141,171
Consumer Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	6,153	4,083
Financing Receivable 30-59 Days Past Due	25	38
Financing Receivable 60-89 Days Past Due	2	16
Financing Receivable 90 Days + Past Due	0	0
Financing Receivable Total Past Due	27	54
Financing Receivable Non-Accrual	13	8
Financing Receivable	$ 6,193	$ 4,145