Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2012

Marketable Securities [Abstract]

Schedule Of Marketable Securities

	June 30, 2012
(In thousands)	Cost		Unrealized Gains		Unrealized Losses			Fair Value
Short-Term
U.S. government and agency obligations	$	7,017	$	17	$	—		$	7,034
Corporate debt securities and certificates of deposit		3,820		5		—			3,825
Marketable securities – short-term	$	10,837	$	22	$	—		$	10,859
Long-Term
U.S. government and agency obligations	$	8,872	$	33	$	(1	)	$	8,904
Corporate debt securities and certificates of deposit		1,609		5		(1	)		1,613
Equity security		84		—		(35	)		49
Marketable securities – long-term	$	10,565	$	38	$	(37	)	$	10,566

	December 31, 2011
(In thousands)	Cost		UnrealizedGains		UnrealizedLosses			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

	June 30, 2012
(In thousands)	Cost		UnrealizedGains		UnrealizedLosses		RecordedBasis
U.S. government and agency obligations	$	543	$	—	$	—	$	543
Corporate debt securities and certificates of deposit		2,434		—		—		2,434
	$	2,977	$	—	$	—	$	2,977

	December 31, 2011
(In thousands)	Cost		UnrealizedGains		UnrealizedLosses		RecordedBasis
U.S. government and agency obligations	$	30	$	—	$	—	$	30
Corporate debt securities and certificates of deposit		655		—		—		655
	$	685	$	—	$	—	$	685