Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Subject to Fair Value Measurements on Recurring Basis

The following table sets forth the Company’s assets and liabilities that were measured at fair value as of March 31, 2014 and December 31, 2013, by level within the fair value hierarchy (in thousands):

	As of March 31, 2014
	Level I		Level II		Level III		Fair Value
Financial Assets:
Cash and cash equivalents:
Commercial paper	$	—	$	20,599	$	—	$	20,599
Bank deposits		—		10,180		—		10,180
Money market funds		7,373		—		—		7,373
Short-term investments:
Commercial paper		—		1,005		—		1,005
Corporate debt obligations		—		23,918		—		23,918
Bank deposits		—		10,244		—		10,244
Total financial assets	$	7,373	$	65,946	$	—	$	73,319

	As of December 31, 2013
	Level I		Level II		Level III		Fair Value
Financial Assets:
Cash and cash equivalents:
Bank deposits	$	—	$	10,165	$	—	$	10,165
Commercial paper		—		21,947		—		21,947
Money market funds		2,619		—		—		2,619
Short-term investments:
Corporate debt obligations		—		28,228		—		28,228
Bank deposits		—		10,153		—		10,153
Total financial assets	$	2,619	$	70,493	$	—	$	73,112