Fair Value Measurements And Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements And Marketable Securities [Abstract]

Schedule Of Fair Value Of Available-For-Sale Securities By Major Security Type

	December 31, 2012
	Level 1		Level 2		Level 3		Total
Bank certificates of deposit	$	—	$	2,524	$	—	$	2,524
U.S. government obligations		880		504		—		1,384
Corporate obligations		453		—		—		453
State and municipal bonds		—		456		—		456
	$	1,333	$	3,484	$	—	$	4,817

	December 31, 2011
	Level 1		Level 2		Level 3		Total
Corporate obligations	$	1,227	$	—	$	—	$	1,227
State and municipal bonds		—		866		—		866
	$	1,227	$	866	$	—	$	2,093