Note 2 - Securities (Details) - Securities With Unrealized Losses - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Note 2 - Securities (Details) - Securities With Unrealized Losses [Line Items]
Less than 12 months, fair value	$ 27,800	$ 53,672
Less than 12 months, unrealized losses	217	174
12 months or more, fair value	42,706	82,470
12 months or more, unrealized losses	842	1,875
Fair value	70,506	136,142
Unrealized losses	1,059	2,049
US Government-sponsored Enterprises Debt Securities [Member]
Note 2 - Securities (Details) - Securities With Unrealized Losses [Line Items]
Less than 12 months, fair value	6,353	36,979
Less than 12 months, unrealized losses	8	30
12 months or more, fair value	8,740	26,848
12 months or more, unrealized losses	186	532
Fair value	15,093	63,827
Unrealized losses	194	562
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 2 - Securities (Details) - Securities With Unrealized Losses [Line Items]
Less than 12 months, fair value	12,929	4,038
Less than 12 months, unrealized losses	129	77
12 months or more, fair value	31,734	49,325
12 months or more, unrealized losses	640	1,268
Fair value	44,663	53,363
Unrealized losses	769	1,345
US States and Political Subdivisions Debt Securities [Member]
Note 2 - Securities (Details) - Securities With Unrealized Losses [Line Items]
Less than 12 months, fair value	7,817	12,655
Less than 12 months, unrealized losses	25	67
12 months or more, fair value	2,232	6,297
12 months or more, unrealized losses	16	75
Fair value	10,049	18,952
Unrealized losses	41	$ 142
Common Stock [Member]
Note 2 - Securities (Details) - Securities With Unrealized Losses [Line Items]
Less than 12 months, fair value	701
Less than 12 months, unrealized losses	55
12 months or more, fair value	0
12 months or more, unrealized losses	0
Fair value	701
Unrealized losses	$ 55