Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value

The following tables present 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 December 31, 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	$	832	$	832	$	—	$	—
Cash equivalents—commercial paper		8,998		—		8,998		—
Cash equivalents—corporate bonds		8,585		—		8,585		—
Total assets	$	18,415	$	832	$	17,583	$	—
Liabilities:
Contingent acquisition consideration	$	2,302	$	—	$	—	$	2,302
Total liabilities	$	2,302	$	—	$	—	$	2,302

	Fair Value Measurement at December 31, 2012
	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	$	1,445	$	1,445	$	—	$	—
Cash equivalents—commercial paper		5,649		—		5,649		—
Cash equivalents—corporate bonds		6,330		—		6,330		—
Total assets	$	13,424	$	1,445	$	11,979	$	—
Liabilities:
Contingent acquisition consideration	$	2,064	$	—	$	—	$	2,064
Total liabilities	$	2,064	$	—	$	—	$	2,064