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Revolving Line of Credit	12 Months Ended
Revolving Line of Credit	Dec. 31, 2015
Debt Disclosure [Abstract]
Revolving Line of Credit	REVOLVING LINE OF CREDIT We entered into a credit agreement on September 5, 2012 with Bank of America, N.A, as the administrative agent and Wells Fargo Bank, N.A, as an initial lender (the “Credit Agreement”). The Credit Agreement provided us with a committed $50 million revolving line of credit facility (the “Credit Facility”). The Credit Facility was repaid in full, then immediately terminated, on December 20, 2013 in connection with the sale and issuance of our 2018 Convertible Senior Notes (see Note 15). We recognized $1.2 million within “interest expense, net” in 2013, for this retired Credit Facility on the accompanying Consolidated Statement of Operations.