Note 7 - Investment Securities (Details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Note 7 - Investment Securities (Details) [Line Items]
Trading Securities, Change in Unrealized Holding Gain (Loss)	$ 32,000
Trading Securities	4,531,000		0
Proceeds from Sale of Available-for-sale Securities	18,970,000	12,387,000
Available-for-sale Securities Pledged as Collateral	165,560,000		207,868,000
Income Tax Benefit Related To Net Realized Gains Losses On Sales Of Securities	308,000	176,000
Proceeds from Sale of Held-to-maturity Securities	0	0
Available-for-sale Securities, Amortized Cost Basis	343,573,000		393,840,000
Available-for-sale Securities	344,277,000		388,670,000
Fair Value Inputs, Prepayment Rate	1.00%
Threshold for Identifying Banks with Trust Preferred Securities	15,000,000,000
Minimum Cost Saving for Refinance	2.00%
Bank Failure Rate	0.36%
Fair Value Inputs, Loss Severity	95.00%
Pooled Trust Preferred Securities [Member]
Note 7 - Investment Securities (Details) [Line Items]
Available-for-sale Securities, Amortized Cost Basis	3,519,000		3,519,000
Available-for-sale Securities	$ 2,393,000		$ 2,069,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year	5
Pooled Trust Preferred Securities [Member] | Minimum [Member]
Note 7 - Investment Securities (Details) [Line Items]
Fair Value Inputs, Loss Severity	0.00%
Pooled Trust Preferred Securities [Member] | Maximum [Member]
Note 7 - Investment Securities (Details) [Line Items]
Fair Value Inputs, Loss Severity	100.00%