Note 4 - Fair Value (Details) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] Estimate of Fair Value Measurement [Member]	Dec. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Estimate of Fair Value Measurement [Member]	Mar. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Dec. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 1 [Member]	Mar. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 2 [Member]	Mar. 31, 2014 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Fair Value, Measurements, Nonrecurring [Member] Fair Value, Inputs, Level 3 [Member]
Note 4 - Fair Value (Details) - Assets Measured at Fair Value on a Nonrecurring Basis [Line Items]
Impaired loans	$ 23,654	$ 31,476		$ 29,014	$ 30,772	$ 0	$ 0	$ 0	$ 0	$ 29,014	$ 30,772
Other real estate owned	$ 1,202		$ 1,838	$ 285	$ 537	$ 0	$ 0	$ 0	$ 0	$ 285	$ 537