Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Financial Assets Measured at Fair Value on Recurring Basis

The following tables present our financial assets that are measured at fair value on a recurring basis (in thousands):

	March 31, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents
Commercial paper	$	—	$	2,000	$	—	$	2,000
Money market mutual funds	1,321		—		—		1,321
Total cash equivalents	1,321		2,000		—		3,321
Marketable securities
Commercial paper	—		7,485		—		7,485
Corporate notes and bonds	—		46,028		—		46,028
Government obligations	—		16,016		—		16,016
U.S. agency obligations	—		31,432		—		31,432
Total marketable securities	—		100,961		—		100,961
Total	$	1,321	$	102,961	$	—	$	104,282

	December 31, 2015
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents
Money market mutual funds	$	246	$	—	$	—	$	246
Marketable securities
Commercial paper	—		7,485		—		7,485
Corporate notes and bonds	—		48,859		—		48,859
Government obligations	—		13,991		—		13,991
U.S. agency obligations	—		32,504		—		32,504
Total marketable securities	—		102,839		—		102,839
Total	$	246	$	102,839	$	—	$	103,085