Note 3 - Loans (Details) - Information On Impaired Loans (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Commercial And Industrial [Member]
Impaired loans with no allowance
Recorded Investment	$ 839	$ 1,287
Unpaid Principal Balance	839	1,289
Average Recorded Investment	2,511	5,162
Impaired loans with an allowance
Recorded Investment	841	21
Unpaid Principal Balance	841	21
Related Allowance	464	21
Average Recorded Investment	221	1,434
Total:
Recorded Investment	1,680	1,308
Unpaid Principal Balance	1,680	1,310
Related Allowance	464	21
Average Recorded Investment	2,732	6,596
Real Estate Mortgage Residential [Member]
Impaired loans with no allowance
Recorded Investment	816	239
Unpaid Principal Balance	813	239
Average Recorded Investment	345	213
Real Estate Mortgage Commercial [Member]
Impaired loans with no allowance
Recorded Investment	13,378	18,369
Unpaid Principal Balance	13,391	18,369
Average Recorded Investment	16,594	19,732
Impaired loans with an allowance
Recorded Investment	684	4,533
Unpaid Principal Balance	685	4,535
Related Allowance	191	503
Average Recorded Investment	3,548	6,836
Total:
Related Allowance	191	503
Real Estate Construction Residential [Member]
Impaired loans with no allowance
Recorded Investment	0	1,426
Unpaid Principal Balance	0	1,426
Average Recorded Investment	1,299	1,529
Real Estate Construction Commercial [Member]
Impaired loans with no allowance
Recorded Investment	0	3,103
Unpaid Principal Balance	0	3,103
Average Recorded Investment	2,339	3,171
Real Estate Mortgage [Member]
Impaired loans with an allowance
Related Allowance	191	503
Total:
Recorded Investment	14,878	23,141
Unpaid Principal Balance	14,889	23,143
Related Allowance	191	503
Average Recorded Investment	20,487	26,781
Real Estate Construction [Member]
Impaired loans with an allowance
Related Allowance	0	0
Total:
Recorded Investment	0	4,529
Unpaid Principal Balance	0	4,529
Related Allowance	0	0
Average Recorded Investment	$ 3,638	$ 4,700