Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements of Company's Financial Assets and Liabilities

The Company’s financial assets and liabilities subject to fair value measurements on a recurring basis and the level of inputs used in such measurements are as follows as of June 30, 2015 and December 31, 2014 (in thousands):

	June 30, 2015
Description	Level 1		Level 2		Level 3		Total
Money market fund	$	9,613	$	—	$	—	$	9,613
U.S. treasury securities		—		17,091		—		17,091
Government-sponsored agencies		—		31,053		—		31,053
Corporate debt securities		—		34,457		—		34,457
Total assets	$	9,613	$	82,601	$	—	$	92,214
	December 31, 2014
Description	Level 1		Level 2		Level 3		Total
Money market fund	$	15,922	$	—	$	—	$	15,922
U.S. treasury securities		—		19,120		—		19,120
Government-sponsored agencies		—		29,763		—		29,763
Commercial paper		—		1,500		—		1,500
Corporate debt securities		—		48,162		—		48,162
Total assets	$	15,922	$	98,545	$	—	$	114,467