Note 22 - Fair Value Measurements (Details Textual) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Provision for Loan and Lease Losses	$ 220,000	$ 200,000	$ 150,000	$ 75,000	$ 0	$ 0	$ 50,000	$ 0	$ 645,000	$ 50,000
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0				$ 0				0	0
Impaired Loan [Member]
Provision for Loan and Lease Losses									158,000	154,000
Foreclosed Real Estate [Member]
SEC Schedule III, Real Estate, Write-down or Reserve, Amount									$ 80,000	$ 100,000
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Minimum [Member]
Fair Value Inputs, Estimated Selling Costs									33.00%	10.00%
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Maximum [Member]
Fair Value Inputs, Estimated Selling Costs									65.00%	59.00%
Fair Value, Inputs, Level 3 [Member] | Impaired Loan [Member] | Weighted Average [Member]
Fair Value Inputs, Estimated Selling Costs									39.00%	16.00%
Fair Value, Inputs, Level 3 [Member] | Foreclosed Real Estate [Member] | Minimum [Member]
Fair Value Inputs, Estimated Selling Costs									10.00%	9.00%
Fair Value, Inputs, Level 3 [Member] | Foreclosed Real Estate [Member] | Maximum [Member]
Fair Value Inputs, Estimated Selling Costs									77.00%	43.00%
Fair Value, Inputs, Level 3 [Member] | Foreclosed Real Estate [Member] | Weighted Average [Member]
Fair Value Inputs, Estimated Selling Costs									38.00%	30.00%