Note 3 - Securities (Details) - Securities Available-for-Sale with Unrealized Losses - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Securities Available for Sale
Less than 12 Months - Fair Value	$ 20,248	$ 11,232
Less than 12 Months - Unrealized Loss	(167)	(20)
Fair Value	28,033	27,540
Unrealized Loss	(216)	(240)
12 Months or More - Fair Value	7,785	16,308
12 Months or More - Unrealized Loss	(49)	(220)
US Government-sponsored Enterprises Debt Securities [Member]
Securities Available for Sale
Less than 12 Months - Fair Value	3,996
Less than 12 Months - Unrealized Loss	(9)
Fair Value	7,995	7,911
Unrealized Loss	(17)	(104)
12 Months or More - Fair Value	3,999	7,911
12 Months or More - Unrealized Loss	(8)	(104)
Mortgage-backed Securities, Issued by Private Enterprises [Member]
Securities Available for Sale
Less than 12 Months - Fair Value	16,252	11,232
Less than 12 Months - Unrealized Loss	(158)	(20)
Fair Value	20,038	19,629
Unrealized Loss	(199)	(136)
12 Months or More - Fair Value	3,786	8,397
12 Months or More - Unrealized Loss	$ (41)	$ (116)