Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2013

Marketable Securities [Abstract]

Schedule Of Marketable Securities

Marketable securities consisted of the following (in thousands):

	September 30, 2013
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	8,750	$	—	$	(7	)	$	8,743
Treasury bills	7,500		—		(1		)	7,499
Total marketable securities	$	16,250	$	—	$	(8	)	$	16,242

	December 31, 2012
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Certificates of deposit	$	6,500	$	—	$	(1	)	$	6,499
Treasury bills	14,996		1		—			14,997
Total marketable securities	$	21,496	$	1	$	(1	)	$	21,496