Note 3 - Restricted Cash and Cash Equivalents and Restricted Investments Available for Sale (Detail) - 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
(Decrease)/increase in comprehensive income	$ (1)	$ 2	$ (3)	$ (13)