Note 4 - Investments Available for Sale (Detail) - The Change in Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Increase/(decrease) in comprehensive income	$ 0	$ (16)	$ 1	$ (61)