Note 7 - Comprehensive Income (Loss) (Details) - Components of Other Comprehensive Income (Loss) and Related Tax Effects (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Components of Other Comprehensive Income (Loss) and Related Tax Effects [Abstract]
Net unrealized gains (losses) arising during the period	$ 473	$ (77)	$ (1,045)	$ (349)
Net unrealized gains (losses) arising during the period	0	0	0	0
Net unrealized gains (losses) arising during the period	473	(77)	(1,045)	(349)
Other comprehensive income (loss)	473	(77)	(1,045)	(349)
Other comprehensive income (loss)	0	0	0	0
Other comprehensive income (loss)	$ 473	$ (77)	$ (1,045)	$ (349)