Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Schedule of fair value measurements

The following tables present the Company’s fair value hierarchy for its assets and liabilities (in thousands):

	As of June 30, 2016
	Aggregate Fair Value		Level 1		Level 2		Level 3
Assets:
Money market accounts	$	81,436	$	81,436	$	—	$	—
Commercial paper	54,974		—		54,974		—
Total assets measured at fair value	$	136,410	$	81,436	$	54,974	$	—
Liabilities:
Acquisition-related contingent consideration	$	9,570	$	—	$	—	$	9,570
Total liabilities measured at fair value	$	9,570	$	—	$	—	$	9,570

	As of December 31, 2015
	Aggregate Fair Value		Level 1		Level 2		Level 3
Assets:
Money market accounts	$	89,153	$	89,153	$	—	$	—
Commercial paper	47,078		—		47,078		—
Total assets measured at fair value	$	136,231	$	89,153	$	47,078	$	—
Liabilities:
Acquisition-related contingent consideration	$	11,075	$	—	$	—	$	11,075
Total liabilities measured at fair value	$	11,075	$	—	$	—	$	11,075

Schedule of short-term investments

Short-term investments are summarized as follows (in thousands):

	As of June 30, 2016			As of December 31, 2015
Commercial Paper:
Amortized cost	$	54,981		$	47,084
Unrealized gains	—			—
Unrealized losses	(7		)	(6		)
Total short-term investments measured at fair value	$	54,974		$	47,078