Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value

The following table presents our financial assets and liabilities that are carried at fair value, classified according to the three categories described above (in thousands):

	Fair Value Measurement at June 30, 2013
	Total		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash equivalents—money market funds	$	1,852	$	1,852	$	—	$	—
Cash equivalents—commercial paper		15,047		—		15,047		—
Cash equivalents—corporate bonds		1,602		—		1,602		—
Total assets	$	18,501	$	1,852	$	16,649	$	—
Liabilities:
Contingent acquisition consideration	$	2,200	$	—	$	—	$	2,200
Total liabilities	$	2,200	$	—	$	—	$	2,200