Marketable Securities and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Summary of Available-for-Sale Marketable Securities

The available-for-sale marketable securities as of December 31, 2015 and December 31, 2014 consist of the following (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
December 31, 2015:
U.S. treasuries	$	64,226	$	9	$	(144	)	$	64,091
Mutual funds	500		4		—			504
Total investments	$	64,726	$	13	$	(144	)	$	64,595
December 31, 2014:
U.S. treasuries	$	50,075	$	22	$	(15	)	$	50,082
Mutual funds	500		6		—			506
Total investments	$	50,575	$	28	$	(15	)	$	50,588

Summary of Financial Assets Measured at Fair Value on Recurring Basis

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis (in thousands):

	Total Fair Value		Level I		Level II		Level III
December 31, 2015:
Certificates of deposit	$	2,319	$	2,319	$	—	$	—
U.S. treasuries	64,091		64,091		—		—
Mutual funds	504		504		—		—
Total	$	66,914	$	66,914	$	—	$	—
December 31, 2014:
Certificates of deposit	$	2,318	$	2,318	$	—	$	—
U.S. treasuries	50,082		50,082		—		—
Mutual funds	506		506		—		—
Interest rate cap	1		—		1		—
Total	$	52,907	$	52,906	$	1	$	—