Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2012

Marketable Securities [Abstract]

Schedule Of Marketable Securities

	December 31, 2012
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Recorded Basis
Short-Term
U.S. government and agency obligations	$	7,358	$	10	$	(35)	$	7,333
Corporate debt securities and certificates of deposit		4,100		5		—		4,105
Marketable securities – short-term	$	11,458	$	15	$	(35)	$	11,438
Long-Term
U.S. government and agency obligations	$	9,033	$	23	$	(23)	$	9,033
Corporate debt securities and certificates of deposit		1,192		4		(1)		1,195
Asset backed securities		165		—		—		165
Equity security		42		—		—		42
Marketable securities – long-term	$	10,432	$	27	$	(24)	$	10,435

	December 31, 2011
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Recorded Basis
Short-Term
U.S. government and agency obligations	$	6,495	$	8	$	—	$	6,503
Corporate debt securities and certificates of deposit		4,133		4		—		4,137
Marketable securities – short-term	$	10,628	$	12	$	—	$	10,640
Long-Term
U.S. government and agency obligations	$	3,653	$	28	$	(1)	$	3,680
Corporate debt securities and certificates of deposit		2,353		9		(2)		2,360
Equity security		84		—		(18)		66
Marketable securities – long-term	$	6,090	$	37	$	(21)	$	6,106

Schedule Of Marketable Securities Classified As Cash Equivalents

	December 31, 2012
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Recorded Basis
Corporate debt securities and certificates of deposit	$	2,824	$	—	$	—	$	2,824
	$	2,824	$	—	$	—	$	2,824

	December 31, 2011
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Recorded Basis
U.S. government and agency obligations	$	30	$	—	$	—	$	30
Corporate debt securities and certificates of deposit		655		—		—		655
	$	685	$	—	$	—	$	685