Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2016

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on a Recurring Basis

The following tables show assets measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015:

	March 31, 2016
(in thousands)	Level 1		Level 2		Level 3
Cash equivalents:
Money market funds	$	3,047	$	—	$	—
Commercial paper		—		13,991		—
Corporate debt securities		—		9,001		—
U.S. government agency securities		—		9,999		—
Total cash equivalents	$	3,047	$	32,991	$	—
Marketable securities:
Commercial paper	$	—	$	43,922	$	—
Corporate debt securities		—		21,251		—
U.S. government agency securities		—		18,980		—
Total marketable securities	$	—	$	84,153	$	—
	December 31, 2015
(in thousands)	Level 1		Level 2		Level 3
Cash equivalents:
Money market funds	$	704	$	—	$	—
Total cash equivalents	$	704	$	—	$	—