Subsequent Events	3 Months Ended
Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events PPP Loan On May 5, 2020, the Company entered into a promissory note (the “Promissory Note”) with Bank of America, N.A., dated May 1, 2020, that provides for a loan in the amount of $9.8 million (the “PPP Loan”) pursuant to the Paycheck Protection Program under the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). The PPP Loan matures on May 5, 2022 and bears interest at a rate of 1.0% per annum. Monthly amortized principal and interest payments are deferred for six months after the date of disbursement. The Promissory Note contains events of default and other provisions customary for a loan of this type. The Paycheck Protection Program provides that the use of PPP Loan amount shall be limited to certain qualifying expenses. All or a portion of the PPP Loan may be forgiven upon application by the Company beginning 60 days, but not later than 120 days, after loan approval and upon documentation of expenditures in accordance with certain specified requirements. Under the CARES Act, loan forgiveness is available for the sum of documented payroll costs, covered rent payments, covered mortgage interest and covered utilities during the eight week period beginning on the date of loan approval. Not more than 25% of the forgiven amount may be for non-payroll costs. The amount of the PPP Loan eligible to be forgiven will be reduced if the Company’s full-time headcount declines, or if salaries and wages for employees with salaries of $100,000 or less annually are reduced by more than 25%. The Company will be required to repay any portion of the outstanding principal that is not forgiven, along with accrued interest, in accordance with the amortization schedule described above. The Company intends to apply for forgiveness of a portion of the loan in accordance with the terms of the CARES Act to the extent applicable. Additionally, on May 5, 2020, the Company entered into the Amendment to Facility Agreements, dated as of May 4, 2020, among the Company, the guarantors party thereto, the lenders party thereto, Deerfield ELGX Revolver, LLC and Deerfield Private Design Fund I.V., L.P. (the “Amendment”). The Amendment amends the Credit Agreement, dated August 9, 2018, by and among the Company, certain of its subsidiaries, the lenders party thereto and Deerfield ELGX Revolver, LLC and amends the Term Loan Facility Agreement, dated as of August 9, 2018, among the Company, certain of its subsidiaries, the lenders party thereto and Deerfield Private Design Fund I.V., L.P., as amended from time to time, to permit the company to incur indebtedness in the form of the PPP Loan. Deerfield Forbearance Agreements On May 26, 2020, we entered into forbearance agreements with Deerfield which provide that Deerfield will not exercise its default rights under the Facility Agreements until June 15, 2020 or earlier upon certain conditions. If the event that we are unable to reach an agreement with Deerfield prior to expiration of the forbearance, or if we are unable to extend the forbearance, Deerfield may exercise its default rights under the Facility Agreements. As of March 31, 2020, we had approximately $180.4 million outstanding under the Deerfield Agreements. Additionally, we would be required to pay exits fees totaling $11.1 million under the Facility Agreement and the remaining $0.1 million commitment fee under the Credit Agreement. If Deerfield were to exercise its default rights, such default would result in a cross default under our 5.00% Notes and our 5.00% Voluntary Notes. As of March 31, 2020, we had $62.0 million outstanding under our 5.00% Notes and $11.1 million outstanding under our 5.00% Voluntary Notes.

Subsequent Events

PPP Loan

On May 5, 2020, the Company entered into a promissory note (the “Promissory Note”) with Bank of America, N.A., dated May 1, 2020, that provides for a loan in the amount of $9.8 million (the “PPP Loan”) pursuant to the Paycheck Protection Program under the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). The PPP Loan matures on May 5, 2022 and bears interest at a rate of 1.0% per annum. Monthly amortized principal and interest payments are deferred for six months after the date of disbursement. The Promissory Note contains events of default and other provisions customary for a loan of this type. The Paycheck Protection Program provides that the use of PPP Loan amount shall be limited to certain qualifying expenses. All or a portion of the PPP Loan may be forgiven upon application by the Company beginning 60 days, but not later than 120 days, after loan approval and upon documentation of expenditures in accordance with certain specified requirements. Under the CARES Act, loan forgiveness is available for the sum of documented payroll costs, covered rent payments, covered mortgage interest and covered utilities during the eight week period beginning on the date of loan approval. Not more than 25% of the forgiven amount may be for non-payroll costs. The amount of the PPP Loan eligible to be forgiven will be reduced if the Company’s full-time headcount declines, or if salaries and wages for employees with salaries of $100,000 or less annually are reduced by more than 25%. The Company will be required to repay any portion of the outstanding principal that is not forgiven, along with accrued interest, in accordance with the amortization schedule described above. The Company intends to apply for forgiveness of a portion of the loan in accordance with the terms of the CARES Act to the extent applicable.

Additionally, on May 5, 2020, the Company entered into the Amendment to Facility Agreements, dated as of May 4, 2020, among the Company, the guarantors party thereto, the lenders party thereto, Deerfield ELGX Revolver, LLC and Deerfield Private Design Fund I.V., L.P. (the “Amendment”). The Amendment amends the Credit Agreement, dated August 9, 2018, by and among the Company, certain of its subsidiaries, the lenders party thereto and Deerfield ELGX Revolver, LLC and amends the Term Loan Facility Agreement, dated as of August 9, 2018, among the Company, certain of its subsidiaries, the lenders party thereto and Deerfield Private Design Fund I.V., L.P., as amended from time to time, to permit the company to incur indebtedness in the form of the PPP Loan.

Deerfield Forbearance Agreements

On May 26, 2020, we entered into forbearance agreements with Deerfield which provide that Deerfield will not exercise its default rights under the Facility Agreements until June 15, 2020 or earlier upon certain conditions. If the event that we are unable to reach an agreement with Deerfield prior to expiration of the forbearance, or if we are unable to extend the forbearance, Deerfield may exercise its default rights under the Facility Agreements. As of March 31, 2020, we had approximately $180.4 million outstanding under the Deerfield Agreements. Additionally, we would be required to pay exits fees totaling $11.1 million under the Facility Agreement and the remaining $0.1 million commitment fee under the Credit Agreement. If Deerfield were to exercise its default rights, such default would result in a cross default under our 5.00% Notes and our 5.00% Voluntary Notes. As of March 31, 2020, we had $62.0 million outstanding under our 5.00% Notes and $11.1 million outstanding under our 5.00% Voluntary Notes.