Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Summary of Company's Financial Assets Carried at Fair Value

The following table summarizes the basis used to measure certain of the Company’s financial assets that are carried at fair value (in thousands):

	Basis of Fair Value Measurements
	Balance		Quoted Prices in Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Balance at December 31, 2013
Cash equivalents — money market funds	$	28,210	$	28,210	$	—	$	—
Cash equivalents — bank deposits		5,001		—		5,001		—
Short-term marketable securities — U.S. government agency securities		100,299		75,288		25,011		—
Balance at June 30, 2014
Cash equivalents - money market funds		27,504		27,504		—		—
Cash equivalents - bank deposits		5,021		—		5,021		—
Short-term marketable securities - U.S. government agency securities		100,170		95,168		5,002		—