Note 8 - Loans and Allowance for Loan Losses (Details) - Loans by Loan Class Modified as TDRs- Six Months Ended (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Commercial:
Number of contracts	1	1	2
Pre- modification outstanding recorded investment	$ 28	$ 288	$ 1,850
Post- modification outstanding recorded investment	28	233	1,850
Commercial:Commercial and Industrial [Member]
Commercial:
Number of contracts		1
Pre- modification outstanding recorded investment		288
Post- modification outstanding recorded investment		233
Commercial:Secured by Commercial Real Estate [Member]
Commercial:
Number of contracts			1
Pre- modification outstanding recorded investment			1,822
Post- modification outstanding recorded investment			1,822
Retail Home Equity Loans And Lines [Member]
Commercial:
Number of contracts	1		1
Pre- modification outstanding recorded investment	28		28
Post- modification outstanding recorded investment	$ 28		$ 28