Cash, Cash Equivalents And Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2013

Cash, Cash Equivalents And Marketable Securities [Abstract]

Summary Of Cash, Cash Equivalents, And Marketable Securities

			Gross		Gross
	Amortized		Unrealized		Unrealized
March 31, 2013	Cost		Gains		Losses		Fair Value
Cash and cash equivalents:
Cash	$	15,350	$	—	$	—	$	15,350
Money market funds		2,387		—		—		2,387
Corporate debt securities		1,451		—		—		1,451
U.S. government agency debt securities		2,742		—		—		2,742
Total cash and cash equivalents	$	21,930	$	—	$	—	$	21,930
Available-for-sale securities:
Total maturing within 1 year and included in marketable securities:
Corporate debt securities	$	26,160	$	21	$	(1)	$	26,180
Government agency debt securities		17,230		9		—		17,239
U.S. Treasury securities		1,004		—		—		1,004
Total maturing between 1 and 2 years and included in marketable securities:
Corporate debt securities		6,533		4		(1)		6,536
U.S. government agency debt securities		—		—		—		-
U.S. Treasury securities		—		—		—		-
Total available-for-sale securities	$	50,927	$	34	$	(2)	$	50,959
Total cash, cash equivalents and marketable securities	$	72,857	$	34	$	(2)	$	72,889
			Gross		Gross
	Amortized		Unrealized		Unrealized
December 31, 2012	Cost		Gains		Losses		Fair Value
Cash and cash equivalents:
Cash	$	11,769	$	—	$	—	$	11,769
Money market funds		11,268		—		—		11,268
Corporate debt securities		6,039		—		—		6,039
Total cash and cash equivalents	$	29,076	$	—	$	—	$	29,076
Available-for-sale securities:
Total maturing within 1 year and included in marketable securities:
Corporate debt securities	$	21,662	$	31	$	—	$	21,693
U.S. government agency debt securities		14,027		8		—		14,035
U.S. Treasury securities		2,008		1		—		2,009
Total maturing between 1 and 2 years and included in marketable securities:
Corporate debt securities		7,858		7		(2)		7,863
U.S. government agency debt securities		3,208		8		—		3,216
Total available-for-sale securities	$	48,763	$	55	$	(2)	$	48,816
Total cash, cash equivalents and marketable securities	$	77,839	$	55	$	(2)	$	77,892

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	$	4,475	$	(2)	$	—	$	—	$	4,475	$	(2)

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

The following tables represent the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2013 and December 31, 2012 (in thousands):

Assets:

March 31, 2013	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	2,387	$	—	$	—	$	2,387
Corporate debt securities		1,451		32,717		—		34,168
Government agency debt securities		2,742		17,239		—		19,981
U.S. Treasury securities		—		1,003		—		1,003
Total	$	6,580	$	50,959	$	—	$	57,539
Liabilities:
Contingent consideration	$	—	$	—	$	1,458	$	1,458

December 31, 2012	Level 1		Level 2		Level 3		Total
Assets:
Money market funds	$	11,268	$	—	$	—	$	11,268
U.S. corporate debt securities		6,039		29,556		—		35,595
U.S. Government agency debt securities		—		17,251		—		17,251
U.S. Treasury securities		—		2,009		—		2,009
Total	$	17,307	$	48,816	$	—	$	66,123
Liabilities:
Contingent consideration	$	—	$	—	$	1,342	$	1,342

Schedule of Financial Liabilities measured at Fair Value on a recurring basis using significant unobservable inputs

	Balance at		Net accretion		Balance at
	December		and fair  value		March
	31, 2012		adjustments		31, 2013
Liabilities:
Contingent consideration obligations	$	1,342	$	116	$	1,458