Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

Marketable securities as of December 31, 2013 and 2012 consisted of the following:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
December 31, 2013:
Short-Term Marketable Securities:
U.S. Treasury securities	$	1,500	$	3	$	—		$	1,503
U.S. government and agency securities	151		1		—			152
Commercial paper and certificates of deposit	1,300		—		—			1,300
Corporate debt securities	22,409		18		(2		)	22,425
Municipal debt securities	500		—		—			500
Total Short-Term Marketable Securities	$	25,860	$	22	$	(2	)	$	25,880
Long-Term Marketable Securities:
Corporate debt securities	2,876		4		(1		)	2,879
Total Long-Term Marketable Securities	$	2,876	$	4	$	(1	)	$	2,879

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
December 31, 2012:
Short-Term Marketable Securities:
U.S. Treasury securities	$	1,800	$	5	$	—		$	1,805
U.S. government and agency securities	3,018		5		—			3,023
Commercial paper and certificates of deposit	6,001		2		—			6,003
Corporate debt securities	16,010		11		(1		)	16,020
Municipal debt securities	—		—		—			—
Total Short-Term Marketable Securities	$	26,829	$	23	$	(1	)	$	26,851
Long-Term Marketable Securities:
U.S. Treasury securities	$	1,502	$	19	$	—		$	1,521
U.S. government and agency securities	156		2		—			158
Corporate debt securities	10,835		34		—			10,869
Total Long-Term Marketable Securities	$	12,493	$	55	$	—		$	12,548

Investments Classified by Contractual Maturity Date

The contractual maturities of our marketable securities at December 31, 2013 are as follows (in thousands):

Due within one year	$	25,880
Due in one to five years	2,879
Total	$	28,759