Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2014

Cash Equivalents, as Well as Hierarchy for Financial Instruments Measured at Fair Value on Recurring Basis

The following table presents the Company’s cash equivalents as well as the hierarchy for its financial instruments measured at fair value on a recurring basis:


			Fair value measurements using:
	Fair Value		Level 1		Level 2		Level 3
March 31, 2014:
Cash equivalents:
Money market funds	$	190,671	$	190,671		—		—
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
March 31, 2014:
Assets:
Bank deposits (included in “Cash and cash equivalents”)	$	50,798	$	50,798		—		—
Liabilities:
Convertible Notes	$	267,824		—	$	267,824		—
December 31, 2013:
Assets:
Bank deposits (included in “Cash and cash equivalents”)	$	39,696	$	39,696		—		—
Liabilities:
Convertible Notes	$	277,145		—	$	277,145		—