Note 9 - Accumulated Other Comprehensive Income - Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Balance beginning of period	$ (4,004)	$ (919)	$ (2,929)	$ (1,091)
Other comprehensive income before reclassifications	1,274	532	199	704
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Net current-period other comprehensive income	1,274	532	199	704
Balance at end of period	$ (2,730)	$ (387)	$ (2,730)	$ (387)