Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2013

Marketable Securities [Abstract]

Schedule Of Marketable Securities

	March 31, 2013
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Fair Value
Short-Term
U.S. government and agency obligations	$	7,577	$	13	$	(3)	$	7,587
Corporate debt securities and certificates of deposit		4,216		4		—		4,220
Marketable securities – short-term	$	11,793	$	17	$	(3)	$	11,807
Long-Term
U.S. government and agency obligations	$	7,964	$	20	$	—	$	7,984
Corporate debt securities and certificates of deposit		1,504		4		(1)		1,507
Asset backed securities		629		—		—		629
Equity security		42		3		—		45
Marketable securities – long-term	$	10,139	$	27	$	(1)	$	10,165

	December 31, 2012
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Fair Value
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 back securities		165		—		—		165
Equity security		42		—		—		42
Marketable securities – long-term	$	10,432	$	27	$	(24)	$	10,435

Schedule Of Marketable Securities Classified As Cash Equivalents

	March 31, 2013
(In thousands)		Cost		Unrealized Gains		Unrealized Losses		Recorded Basis
U.S. government and agency obligations	$	300	$	—	$	—	$	300
Corporate debt securities and certificates of deposit		755		—		—		755
	$	1,055	$	—	$	—	$	1,055

	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