Cash, Money Market Funds and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2013

Cash, Money Market Funds and Marketable Securities

Schedule of cash and available for sale securities

Cash and available for sale securities consisted of the following as of December 31, 2012 and December 31, 2013 (in thousands):

	As of December 31, 2012
	Cost		Unrealized Gain		Unrealized Loss			Fair Value
Cash balances	$	33,971	$	—	$	—		$	33,971
Corporate debt securities		42,503		5		(11	)		42,497
Commercial paper		19,725		19		—			19,744
Certificate of deposit		2,909		1		—			2,910
	$	99,108	$	25	$	(11	)	$	99,122
Included in cash and cash equivalents	$	33,971	$	—	$	—		$	33,971
Included in marketable securities		65,137		25		(11	)		65,151
Total cash and marketable securities	$	99,108	$	25	$	(11	)	$	99,122

	As of December 31, 2013
	Cost		Unrealized Gain		Unrealized Loss			Fair Value
Cash balances	$	43,640	$	—	$	—		$	43,640
Corporate debt securities		30,817		1		(6	)		30,812
Commercial paper		7,192		6		—			7,198
Certificate of deposit		350		—		—			350
	$	81,999	$	7	$	(6	)	$	82,000
Included in cash and cash equivalents	$	43,640	$	—	$	—		$	43,640
Included in marketable securities		38,359		7		(6	)		38,360
Total cash and marketable securities	$	81,999	$	7	$	(6	)	$	82,000

Schedule of changes in AOCI associated with the unrealized holding gain on available-for-sale investments

The changes in AOCI associated with the unrealized holding gain on available-for-sale investments during the years ended December 31, 2012 and 2013, were as follows (in thousands):

	Year Ended December 31,
	2012		2013
Balance, beginning	$	4	$	14
Current period changes in fair value,(a)		10		(13	)
Reclassification of earnings,(a)		—		—
Balance, ending	$	14	$	1

(a)

— Taxes have not been accrued on the unrealized gain on securities as the Company is in a loss position for all periods presented