Fair Value Measurements And Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Measurements And Marketable Securities [Abstract]

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

	June 30, 2013
	Level 1		Level 2		Level 3		Total
Bank certificates of deposit	$	—	$	2,641	$	—	$	2,641
U.S. government obligations		951		250		—		1,201
Corporate obligations		352		—		—		352
State and municipal bonds		—		201		—		201
	$	1,303	$	3,092	$	—	$	4,395
	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