Note 3 - Loans (Details) - Information On Impaired Loans (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Commercial And Industrial [Member]
Impaired loans with no allowance
Recorded Investment	$ 1,441	$ 1,287
Unpaid Principal Balance	1,441	1,289
Average Recorded Investment	1,036	5,162
Impaired loans with an allowance
Recorded Investment		21
Unpaid Principal Balance		21
Related Allowance		21
Average Recorded Investment	216	1,434
Total:
Recorded Investment	1,441	1,308
Unpaid Principal Balance	1,441	1,310
Related Allowance		21
Average Recorded Investment	1,252	6,596
Real Estate Mortgage Residential [Member]
Impaired loans with no allowance
Recorded Investment	606	239
Unpaid Principal Balance	606	239
Average Recorded Investment	451	213
Real Estate Mortgage Commercial [Member]
Impaired loans with no allowance
Recorded Investment	12,700	18,369
Unpaid Principal Balance	12,713	18,369
Average Recorded Investment	14,204	19,732
Impaired loans with an allowance
Recorded Investment	657	4,533
Unpaid Principal Balance	658	4,535
Related Allowance	174	503
Average Recorded Investment	2,463	6,836
Total:
Related Allowance	174	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	713	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	1,552	3,171
Real Estate Mortgage [Member]
Impaired loans with an allowance
Related Allowance	174	503
Total:
Recorded Investment	13,963	23,141
Unpaid Principal Balance	13,977	23,143
Related Allowance	174	503
Average Recorded Investment	17,118	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	$ 2,265	$ 4,700