Note 10 - Accumulated Other Comprehensive Income (Detail) - Accumulated Balances of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Beginning balance	$ (490)
Beginning balance	40
Beginning balance	4,625
Beginning balance	4,175
Other comprehensive income (loss) before reclassifications	(15)
Other comprehensive income (loss) before reclassifications	(6)
Other comprehensive income (loss) before reclassifications	303
Other comprehensive income (loss) before reclassifications	282
Amounts reclassified from accumulated other comprehensive income	(1)
Amounts reclassified from accumulated other comprehensive income	(1)
Net current period other comprehensive income (loss)	(15)
Net current period other comprehensive income (loss)	(7)
Net current period other comprehensive income (loss)	303
Net current period other comprehensive income (loss)	281
Ending balance	(505)
Ending balance	33
Ending balance	4,928
Ending balance	$ 4,456