Note 10 - Accumulated Other Comprehensive Income (Details) - Accumulated Balances of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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 (loss) before reclassifications			(32)
Other comprehensive income (loss) before reclassifications			(20)
Other comprehensive income (loss) before reclassifications			1,164
Other comprehensive income (loss) before reclassifications			1,112
Amounts reclassified from accumulated other comprehensive income			(2)
Amounts reclassified from accumulated other comprehensive income			(2)
Net current period other comprehensive income (loss)			(32)
Net current period other comprehensive income (loss)			(22)
Net current period other comprehensive income (loss)			1,164
Net current period other comprehensive income (loss)	830	17	1,110	489
Balance as of June 30, 2013	(522)		(522)
Balance as of June 30, 2013	18		18
Balance as of June 30, 2013	5,789		5,789
Balance as of June 30, 2013	$ 5,285		$ 5,285