Note 10 - Accumulated Other Comprehensive Income (Details) - Accumulated Balances of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accumulated Balances of Other Comprehensive Income [Abstract]
Balance as of January 1, 2013			$ (490)
Balance as of January 1, 2013			40
Balance as of January 1, 2013			4,625
Balance as of January 1, 2013			4,175
Other comprehensive income before reclassifications			117
Other comprehensive income before reclassifications			15
Other comprehensive income before reclassifications			1,595
Other comprehensive income before reclassifications			1,727
Amounts reclassified from accumulated other comprehensive income			(3)
Amounts reclassified from accumulated other comprehensive income			(3)
Net current period other comprehensive income			117
Net current period other comprehensive income			12
Net current period other comprehensive income			1,595
Net current period other comprehensive income	614	(57)	1,724	432
Balance as of September 30, 2013	(373)		(373)
Balance as of September 30, 2013	52		52
Balance as of September 30, 2013	6,220		6,220
Balance as of September 30, 2013	$ 5,899		$ 5,899