Note B - Restricted Cash and Cash Equivalents and Restricted Investments Available for Sale (Tables)

12 Months Ended

Dec. 31, 2012

Restricted Cash And Investments Current Item Description [Table Text Block]

	2012		2011
Restricted cash and cash equivalents	$	200	$	13,449
Restricted investments available for sale:
U.S. Treasury Notes		0		5,007
Corporate Notes and Bonds		0		4,062
Accrued interest income		0		84
Total restricted investments available for sale		0		9,153
Total restricted cash and cash equivalents and restricted investments available for sale	$	200	$	22,602

Unrealized Gain Loss On Restricted Investments [Table Text Block]

	2011
Gross unrealized holding gains	$	8
Gross unrealized holding losses		3

Schedule Of Comprehensive Income Loss Restricted Investments [Table Text Block]

	2012			2011			2010
(Decrease)/Increase in comprehensive income	$	(3	)	$	(30	)	$	34

Realized Gains And Proceeds From Sale Of Restricted Investments [Table Text Block]

	2012
Proceeds from sale of restricted investments	$	2,015
Realized gain on sale of restricted investments		3