Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Commercial and Industrial [Member]
Total:
Average Recorded Investment	$ 1,488	$ 4,337	$ 1,440	$ 3,604
Interest Income Recognized	21	80	33
Real Estate Construction [Member]
Total:
Average Recorded Investment	446	616	1,796	617
Interest Income Recognized			1	82
Residential Real Estate Mortgage [Member]
Total:
Average Recorded Investment	2,872	574	2,998	583
Interest Income Recognized	61	33	88
Commercial Real Estate Mortgage [Member]
Total:
Average Recorded Investment	2,124	3,762	3,190	3,430
Interest Income Recognized	98	35	124	45
Consumer Installment [Member]
Total:
Average Recorded Investment	27		26
Interest Income Recognized			$ 1	$ 102