Note 7 - Loans And Related Allowance For Loan Losses (Details) - Past Due Financing Receivables (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	$ 395,265	$ 391,032
Financing Receivable 30-59 Days Past Due	3,171	3,589
Financing Receivable 60-89 Days Past Due	1,541	1,561
Financing Receivable 90 Days + Past Due	541	438
Financing Receivable Total Past Due	5,253	5,588
Financing Receivable Non-Accrual	11,880	11,813
Financing Receivable	412,399	408,433
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	47,680	60,428
Financing Receivable 30-59 Days Past Due	650	441
Financing Receivable 60-89 Days Past Due	72	63
Financing Receivable 90 Days + Past Due	108	348
Financing Receivable Total Past Due	830	852
Financing Receivable Non-Accrual	1,388	908
Financing Receivable	49,898	62,188
Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	23,360	22,158
Financing Receivable 30-59 Days Past Due	647	0
Financing Receivable 60-89 Days Past Due	0	0
Financing Receivable 90 Days + Past Due	0	0
Financing Receivable Total Past Due	647	0
Financing Receivable Non-Accrual	78	364
Financing Receivable	24,084	22,522
Residential Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	187,125	191,349
Financing Receivable 30-59 Days Past Due	1,854	2,614
Financing Receivable 60-89 Days Past Due	1,466	1,401
Financing Receivable 90 Days + Past Due	434	90
Financing Receivable Total Past Due	3,753	4,105
Financing Receivable Non-Accrual	8,372	8,418
Financing Receivable	199,250	203,872
Commercial Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	133,057	113,023
Financing Receivable 30-59 Days Past Due	0	509
Financing Receivable 60-89 Days Past Due	0	97
Financing Receivable 90 Days + Past Due	0	0
Financing Receivable Total Past Due	0	606
Financing Receivable Non-Accrual	1,949	2,105
Financing Receivable	135,006	115,734
Consumer Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable Current	4,043	4,074
Financing Receivable 30-59 Days Past Due	21	25
Financing Receivable 60-89 Days Past Due	3	0
Financing Receivable 90 Days + Past Due	0	0
Financing Receivable Total Past Due	24	25
Financing Receivable Non-Accrual	94	18
Financing Receivable	$ 4,161	$ 4,117