Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of Cash Equivalents and Marketable Securities

As of December 31, 2015, the Company maintained only cash equivalents comprised of money market funds. Cash equivalents and marketable securities as of March 31, 2016 consisted of the following:

	March 31, 2016
(in thousands)	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Cash equivalents:
Money market funds	$	3,047	$	—	$	—		$	3,047
Commercial paper		13,993		—		(2	)		13,991
Corporate debt securities		9,002		—		(1	)		9,001
U.S. government agency securities		9,999		—		—			9,999
Total cash equivalents	$	36,041	$	—	$	(3	)	$	36,038
Marketable securities:
Commercial paper	$	43,929	$	—	$	(7	)		43,922
Corporate debt securities		21,254		—		(3	)		21,251
U.S. government agency securities		18,981		1		(2	)		18,980
Total marketable securities	$	84,164	$	1	$	(12	)	$	84,153