Note 4 - Investments Available for Sale (Detail) - The Change in Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Increase/(decrease) in comprehensive income	$ 0	$ (33)	$ 2	$ (45)