Note 11 - Fair Values - Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($)		Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member]
Impaired loans (1)	[1]	$ 0	$ 0
Foreclosed assets (1)	[1]	0	0
Total		0	0
Fair Value, Inputs, Level 2 [Member]
Impaired loans (1)	[1]	0	0
Foreclosed assets (1)	[1]	0	0
Total		0	0
Fair Value, Inputs, Level 3 [Member]
Impaired loans (1)	[1]	9,012,000	8,970,000
Foreclosed assets (1)	[1]	815,000	1,293,000
Total		9,827,000	10,263,000
Impaired loans (1)	[1]	9,012,000	8,970,000
Foreclosed assets (1)	[1]	815,000	1,293,000
Total		$ 9,827,000	$ 10,263,000

[1] Represents carrying value and related write-downs for which adjustments are based on the estimated value of the property or other assets.