Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

Cash and Cash Equivalents and Marketable Securities, Measured at Fair Value on Recurring Basis

The Company’s cash equivalents and marketable securities that are measured at fair value on a recurring basis are classified as follows (in thousands):

	March 31, 2014						December 31, 2013
	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
	(unaudited)
Cash and Cash Equivalents:
Money market funds	$	43,198	$	—	$	—	$	43,815	$	—	$	—
Corporate bonds		—		823		—		—		—		—
Commercial paper		—		845		—		—		2,143		—
Marketable Securities:
U.S. agency notes		—		24,207		—		—		23,297		—
Corporate bonds		—		43,119		—		—		42,768		—
Commercial paper		—		36,441		—		—		36,613		—
	$	43,198	$	105,435	$	—	$	43,815	$	104,821	$	—