Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

Financial assets and liabilities measured at fair value on a recurring basis are summarized below:

			Fair value measurements using:
	Fair Value		Level 1		Level 2		Level 3
December 31, 2014:
Cash equivalents:
Money market funds	$	189,031	$	189,031		—		—
Current liabilities:
Contingent consideration	$	10,000		—		—	$	10,000
Long-term liabilities:
Contingent consideration	$	96,000		—		—	$	96,000
December 31, 2013:
Cash equivalents:
Money market funds	$	189,092	$	189,092		—		—

Fair Value of Other Financial Instruments Not Measured on Recurring Basis

The following table presents the total balance of the Company’s other financial instruments that are not measured at fair value on a recurring basis.

			Fair value measurements using:
	Total Balance		Level 1		Level 2		Level 3
December 31, 2014:
Assets:
Bank deposits (included in “Cash and cash equivalents”)	$	313,646	$	313,646		—		—
Liabilities:
Convertible Notes	$	359,219		—	$	359,219		—
December 31, 2013:
Assets:
Bank deposits (included in “Cash and cash equivalents”)	$	39,696	$	39,696		—		—
Liabilities:
Convertible Notes	$	277,145		—	$	277,145		—