Cash, Cash Equivalents And Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2012

Cash, Cash Equivalents And Marketable Securities [Abstract]

Summary Of Cash, Cash Equivalents, And Marketable Securities

			Gross		Gross
	Amortized		Unrealized		Unrealized
June 30, 2012	Cost		Gains		Losses		Fair Value
Cash and cash equivalents:
Cash	$	7,640	$	—	$	—	$	7,640
Money market funds		882		—		—		882
Corporate debt securities		4,999		—		—		4,999
U.S. government agency debt securities		—		—		—		-
Total cash and cash equivalents	$	13,521	$	—	$	—	$	13,521
Available-for-sale securities:
Total maturing within 1 year and included in marketable securities:
Corporate debt securities	$	35,512	$	33	$	(5)	$	35,540
Government agency debt securities		19,815		21		—		19,836
U.S. Treasury securities		3,314		1		—		3,315
Total maturing between 1 and 2 years and included in marketable securities:								-
Corporate debt securities		4,934		14		—		4,948
U.S. government agency debt securities		5,505		10		—		5,515
U.S. Treasury securities		6,359		—		(3)		6,356
Total available-for-sale securities	$	75,439	$	79	$	(8)	$	75,510
Total cash, cash equivalents and marketable securities	$	88,960	$	79	$	(8)	$	89,031
	Amortized		Unrealized		Unrealized
December 31, 2011	Cost		Gains		Losses		Fair Value
Cash and cash equivalents:
Cash	$	5,629	$	—	$	—	$	5,629
Money market funds		12,467		—		—		12,467
U.S. corporate debt securities		5,947		—		—		5,947
Total cash and cash equivalents	$	24,043	$	—	$	—	$	24,043
Available-for-sale securities:
Total maturing within 1 year and included in marketable securities:
Corporate debt securities	$	49,717	$	10	$	(9)	$	49,718
U.S. government agency debt securities		5,503		2		—		5,505
U.S. Treasury securities		6,870		13		—		6,883
Total maturing between 1 and 2 years and included in marketable securities:
Corporate debt securities		17,767		7		(62)		17,712
U.S. government agency debt securities		35,906		30		(4)		35,932
Total available-for-sale securities	$	115,763	$	62	$	(75)	$	115,750
Total cash, cash equivalents and marketable securities	$	139,806	$	62	$	(75)	$	139,793

Schedule Of Gross Unrealized Losses And Fair Values Of Investments

	Less than 12 months				12 months or greater				Total
			Gross				Gross				Gross
			Unrealized				Unrealized				Unrealized
	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
Corporate debt securities	$	16,215	$	(5)	$	—	$	—	$	16,215	$	(5)
U.S. Treasury securities		8,370		(3)		—		—		8,370		(3)
U.S. government agency debt securities		—		—		—		—		-		-
Total available-for-sale	$	24,585	$	(8)	$	—	$	—	$	24,585	$	(8)

Schedule Of Financial Assets Measured At Fair Value On A Recurring Basis

Assets:

	Level 1		Level 2		Level 3		Total
Money market funds	$	882	$	—	$	—	$	882
Corporate debt securities		—		45,487		—		45,487
Government agency debt securities		—		25,350		—		25,350
U.S. Treasury securities		—		9,672		—		9,672
Total	$	882	$	80,509	$	—	$	81,391
Liabilities:
Contingent consideration	$	—	$	—	$	1,303	$	1,303

The fair value measurement of the contingent consideration obligations arises from the Zipsor acquisition and relates to the potential future milestone payments under the Zipsor agreement which is determined using Level 3 inputs. The key assumptions in determining the fair value are the discount rate and the probability assigned to the potential milestones being achieved. At each reporting date, the Company will re-measure the contingent consideration obligation arising from the Zipsor acquisition to its estimated fair value. Any changes in the fair value of contingent consideration will be recognized in operating expenses until the contingent consideration arrangement is settled.

The following table represents the Company’s fair value hierarchy for its financial assets measured at fair value on a recurring basis as of December 31, 2011 (in thousands):

	Level 1		Level 2		Level 3		Total
Money market funds	$	12,467	$	—	$	—	$	12,467
U.S. corporate debt securities		—		73,378		—		73,378
U.S. Government agency debt securities		—		41,437		—		41,437
U.S. Treasury securities		—		6,882		—		6,882
Total	$	12,467	$	121,697	$	—	$	134,164