Note 2 - Investment Securities (Details) - Unrealized Loss Positions of Available for Sale Securities (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Note 2 - Investment Securities (Details) - Unrealized Loss Positions of Available for Sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	$ 18,943	$ 0
Unrealized Loss, Less than 12 Months	(1,080)	0
Estimated Fair Value, 12 Months or More	1,827	8,696
Unrealized Loss, 12 Months or More	(29)	(90)
Estimated Fair Value, Total	20,770	8,696
Unrealized Loss, Total	(1,109)	(90)
US Government Agency Securities [Member]
Note 2 - Investment Securities (Details) - Unrealized Loss Positions of Available for Sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	6,429	0
Unrealized Loss, Less than 12 Months	(234)	0
Estimated Fair Value, 12 Months or More	1,614	3,400
Unrealized Loss, 12 Months or More	(6)	(32)
Estimated Fair Value, Total	8,043	3,400
Unrealized Loss, Total	(240)	(32)
Mortgage-Backed Securities [Member]
Note 2 - Investment Securities (Details) - Unrealized Loss Positions of Available for Sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	5,488	0
Unrealized Loss, Less than 12 Months	(147)	0
Estimated Fair Value, 12 Months or More	0	3,701
Unrealized Loss, 12 Months or More	0	(35)
Estimated Fair Value, Total	5,488	3,701
Unrealized Loss, Total	(147)	(35)
Municipal Securities [Member]
Note 2 - Investment Securities (Details) - Unrealized Loss Positions of Available for Sale Securities [Line Items]
Estimated Fair Value, Less than 12 Months	7,026	0
Unrealized Loss, Less than 12 Months	(699)	0
Estimated Fair Value, 12 Months or More	213	1,595
Unrealized Loss, 12 Months or More	(23)	(23)
Estimated Fair Value, Total	7,239	1,595
Unrealized Loss, Total	$ (722)	$ (23)