Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2012

Marketable Securities [Abstract]

Schedule Of Marketable Securities

	September 30, 2012
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Fair Value
Short-Term
U.S. government and agency obligations	$	7,050	$	9	$	(27)	$	7,032
Corporate debt securities and certificates of deposit		5,047		7		—		5,054
Marketable securities – short-term	$	12,097	$	16	$	(27)	$	12,086
Long-Term
U.S. government and agency obligations	$	8,731	$	27	$	(23)	$	8,735
Corporate debt securities and certificates of deposit		798		3		—		801
Asset backed securities		165		—		—		165
Equity security		84		—		(47)		37
Marketable securities – long-term	$	9,778	$	30	$	(70)	$	9,738

	December 31, 2011
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Fair Value
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

	September 30, 2012
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Recorded Basis
U.S. government and agency obligations	$	26	$	—	$	—	$	26
Corporate debt securities and certificates of deposit		2,536		—		—		2,536
	$	2,562	$	—	$	—	$	2,562

	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