Note 13 - Accumulated Other Comprehensive Income (Details) - Components of Accumulated Other Comprehensive Income - USD ($) $ in Thousands	3 Months Ended				6 Months Ended	12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	$ (683)		$ (907)		$ (683)	$ (87)	$ (2,392)
Comprehensive income (loss)	(867)	$ 271	(181)	$ 1,666	(596)	2,305
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	1,135		1,092		1,135	1,810	(1,809)
Comprehensive income (loss)	(967)	292	1,115	1,786
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss)	(1,818)		(1,999)		$ (1,818)	$ (1,897)	$ (583)
Comprehensive income (loss)	$ 100	$ (21)	$ (1,296)	$ (120)