Cash, Cash Equivalents and Short-term Investments (Tables)

12 Months Ended

Dec. 31, 2013

Cash and Cash Equivalents [Abstract]

Schedule of cash, cash equivalents and available-for-sale investments

he following tables display gross unrealized gains and gross unrealized losses for cash, cash equivalents and available-for-sale investments for the periods presented:

	As of December 31, 2013
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair value
Cash and cash equivalents:
Demand deposits and other cash	$	15,451	$	—	$	—		$	15,451
Money market funds	22,991		—		—			22,991
Commercial paper	150		—		—			150
Corporate debt securities	1,060		—		—			1,060
Total cash and cash equivalents	39,652		—		—			39,652
Short-Term Investments:
Commercial paper	750		—		—			750
U.S. government agency securities	11,275		5		(1		)	11,279
U.S. Treasury securities	5,233		2		—			5,235
Municipal debt securities	4,758		7		—			4,765
Corporate debt securities	65,982		20		(7		)	65,995
Total short-term investments	87,998		34		(8		)	88,024
Total cash, cash equivalents and short-term investments	$	127,650	$	34	$	(8	)	$	127,676

	As of December 31, 2012
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair value
Cash and cash equivalents:
Demand deposits and other cash	$	39,982	$	—	$	—	$	39,982
Money market funds	45,040		—		—		45,040
Commercial paper	7,498		1		—		7,499
Total cash and cash equivalents	92,520		1		—		92,521
Short-Term Investments:
Commercial paper	24,987		1		—		24,988
U.S. government agency securities	9,998		3		—		10,001
Total short-term investments	34,985		4		—		34,989
Total cash, cash equivalents and short-term investments	$	127,505	$	5	$	—	$	127,510

Investments Classified by Contractual Maturity Date [Table Text Block]

Classification of the cash, cash equivalent and short-term investments by contractual maturity was as follows:

(in thousands)	One year or shorter		Between 1 and 2 years		Total
Balances as of December 31, 2013
Cash and cash equivalents (1)	$	39,652	$	—	$	39,652
Short-term investments	71,464		16,560		88,024
Cash, cash equivalents and short-term investments	111,116		16,560		127,676
Balances as of December 31, 2012
Cash and cash equivalents (1)	$	92,521	$	—	$	92,521
Short-term investments	34,989		—		34,989
Cash, cash equivalents and short-term investments	$	127,510	$	—	$	127,510

(1) Includes demand deposits and other cash, money market funds and other cash equivalent securities, all with 0-90 day maturity at purchase.

All the above tables exclude restricted cash, primarily held in certificates of deposit, of $0.3 million as of December 31, 2013 and December 31, 2012 which is classified in prepaids and other current assets on the consolidated balance sheet.