Note 7 - Fair Value of Financial Instruments (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]
Loans Held-for-sale, Write-down	$ 0		$ 0
SBA Servicing Assets [Member]
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Key Assumptions, Percent	10.00%		10.00%
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Key Assumptions	20.00%		20.00%
Not Included in Fair Value Adjustments [Member]
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]
Servicing Fees	$ 434,000	$ 417,000