Subsequent Events	12 Months Ended
Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Convertible Note Exchange On February 24, 2020, the Company and three investors holding approximately $11.0 million of the principal amount of the Company’s 3.25% Senior Notes due 2020 (the “Holders”) entered into an Exchange Agreement (the “2020 Exchange Agreement”) providing for the exchange of the Holders’ existing notes (the “Existing Notes”) for new 5.00% Voluntary Convertible Senior Notes due 2024 (the “2020 5.00% Voluntary Notes”). Pursuant to the 2020 Exchange Agreement, on February 24, 2020, the exchanging Holders are exchanging all outstanding principal plus accrued and unpaid interest under the Existing Notes into the same amount of principal of 2020 5.00% Voluntary Notes pursuant to the 2020 Exchange Agreement. The 2020 5.00% Voluntary Notes are being issued in a transaction exempt from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”) by virtue of Section 4(a)(2) of the Securities Act and Rule 506 thereunder. The 2020 5.00% Voluntary Notes will be governed by an Indenture (the “New Indenture”), by and between the Company and Wilmington, as trustee. The 2020 5.00% Voluntary Notes will accrue interest at a rate of 5.00% per year, payable semi-annually in arrears on April 1 and October 1 of each year, commencing April 1, 2020. The 2020 5.00% Voluntary Notes will mature on April 2, 2024, unless earlier purchased, redeemed or converted in accordance with the terms of the New Indenture. The New Indenture governing the 2020 5.00% Voluntary Notes will contain customary terms and covenants and events of default. The 2020 5.00% Voluntary Notes will be convertible at the option of each Holder into shares of common stock at any time prior to the close of business on the business day immediately preceding January 1, 2024; provided that, except if the Company undergoes a fundamental change (as defined in the New Indenture) and for certain other customary circumstances of conversion, each Holder may not convert more than 30% the initial aggregate principal amount of its outstanding 2020 5.00% Voluntary Notes per calendar quarter (a “Voluntary Conversion”). Beginning January 1, 2024, until the close of business on the business day immediately preceding the maturity date, the 2020 5.00% Voluntary Notes will be convertible at the option of the holder at any time regardless of the conditions described in this paragraph. The initial conversion rate of the 2020 5.00% Voluntary Notes in a Voluntary Conversion is 0.4445 shares of the Company’s common stock per $1.00 principal amount of the 2020 5.00% Voluntary Notes, which is equivalent to an initial conversion price per share equal to $2.25 (the “Conversion Price”). The conversion rate is subject to adjustment upon the occurrence of certain specified events. Except if the Company undergoes a fundamental change (as defined in the New Indenture) and for certain other customary circumstances of conversion, in no event prior to the close of business on the business day immediately preceding January 1, 2024 may the 2020 5.00% Voluntary Notes be converted in a calendar quarter unless the closing sale price of the Company’s common stock for at least twenty (20) trading days during the period of thirty (30) consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 110% of the Conversion Price (subject to adjustment upon the occurrence of certain specified events) (the “Voluntary Conversion Threshold”). The 2020 5.00% Voluntary Notes will be secured by the Company’s assets pursuant to a Junior Lien Security Agreement by and between the Company and Wilmington, as collateral agent (the “JLSA”). The JLSA grants a second lien on the Company’s assets that is second in priority to the security interests granted (i)_to Deerfield, as agent, pursuant to the Amended and Restated Guaranty and Security Agreement, dated August 9, 2018, by and among the Company, its subsidiaries and Deerfield, as agent, as amended to date and (ii) to Deerfield ELGX Revolver, LLC, as agent (“Deerfield ELGX”), pursuant to the Guaranty and Security Agreement, dated as of August 9, 2018, by and among the Company, its subsidiaries and Deerfield ELGX, as agent. as amended to date. In connection with the issuance of the 2020 5.00% Voluntary Notes, the parties entered into Subordination and Intercreditor Agreement, dated as of February 24, 2020, by and among the Company, Deerfield, Deerfield ELGX and Wilmington, as collateral agent (the “Subordination Agreement”). The Subordination Agreement contains customary provisions associated with the subordination of the security interest of the 2020 5.00% Voluntary Notes. The New Indenture will provide that in no event may a Holder convert into shares of common stock if such conversion would result in the Holder beneficially owning more that 9.5% of the Company’s outstanding common stock. Exchange Agreement and Fourth Amendment to Facility Agreement On February 24, 2020, the Company entered into a February 2020 Exchange Agreement and Fourth Amendment to Amended and Restated Facility Agreement and Amendment to First Out Waterfall Notes (the “Fourth Facility Amendment”) with Deerfield, dated August 9, 2018 (as amended to date, the “Fourth Facility Agreement”). The Facility Amendment provides for, among other things, the conversion of certain portions of the outstanding convertible debt upon the achievement of certain milestones. In addition, 8.333% (or approximately $10.7 million as of February 24, 2020) of the First Out Waterfall Notes currently due on the First Amortization Date (the “First Amortization Payment”) will be extended to July 1, 2021. In the event the Company satisfies the Initial Exchange Condition (as defined below) and provided that the Company reports net revenue of at least $142.5 million for the year ended December 31, 2020 and complies with the global excess liquidity requirement (the “Maturity Extension Conditions”), the maturity date shall be extended from April 2, 2023 to December 22, 2023 and the second amortization date shall be extended from April 2, 2022 to April 2, 2023. Further, the Fourth Facility Agreement provides that the interest payment date due April 1, 2020 will be payable in paid-in-kind interest by increasing the principal amount of the loans by an amount equal to the interest that has accrued. The Fourth Facility Amendment provides for the exchange of the existing notes representing the First Out Waterfall Notes for amended notes (the “Amended First Out Waterfall Notes”). The Amended First Out Waterfall Notes reduced the Fixed Conversion Price under the existing notes from $6.625 to $2.00 (the “New Fixed Conversion Price”); provided that if the Initial Exchange Condition (as defined below) is not met by June 30, 2020, then such price shall revert to $6.625. The Amended First Out Waterfall Notes provide that the Company may require Deerfield to convert up to $40.0 million of principal amount (the “Forced Conversion Cap”) provided that the arithmetic average of the volume weighted average price of the Company’s common stock on each of the fifteen (15) consecutive trading days ending on the conversion date (the “Forced Conversion 15 Day VWAP”), and the closing price on the conversion date, is greater than 200% of the New Fixed Conversion Price into shares of the Company’s newly created Series DF-1 Preferred Stock, par value $0.001 per share (the “Preferred Stock”), at a price per share equal to the product of (i) the Preferred Exchange Rate (as defined below) and (ii) and 85% of the lesser of the closing price of the common stock on such conversion date (the “Closing Price”) and the Forced Conversion 15 Day VWAP, provided that such lesser price is greater than or equal to 170% of the New Fixed Conversion Price and other conditions are met (each such conversion, a “Forced Conversion”). A Forced Conversion may only occur once every 31 calendar days and any individual Forced Conversion may not exceed the lesser of (i) $3.5 million or (ii) the Forced Conversion Cap less any prior Forced Conversions or Discretionary Conversions (as defined below). Deerfield also has the option to convert up to $60.0 million (less any amounts converted pursuant to Forced Conversions) of the Company’s outstanding debt (any such conversion, a “Discretionary Conversion”) into, at Deerfield’s option and subject to the Ownership Cap, shares of Common Stock at a rate equal to the greater of the New Fixed Conversion Price and 85% of the 15 Day VWAP, provided that such conversion price is not less than the Floor Price (the “Discretionary Common Conversion Rate”) or shares of Preferred Stock at a rate (the “Discretionary Preferred Conversion Rate”) equal to the product of (i) the Preferred Exchange Rate (as defined below) multiplied by (ii) the Discretionary Common Conversion Rate. The Preferred Stock is convertible into common stock at an initial rate of 100 shares of common stock for each share of Preferred Stock, as may be adjusted pursuant to the Certificate of Designation of Preferences, Rights and Limitations of Series DF-1 Preferred Stock (the “Certificate of Designation”) (the “Preferred Exchange Rate”). Pursuant to the Certificate of Designation, 1,105,000 shares of Preferred Stock have been authorized for issuance. The Preferred Stock does not possess any voting rights. The Preferred Stock is subject to customary adjustments for stock events. The Preferred Stock provides that in no event may Deerfield convert the Preferred Stock into shares of common stock if such conversion would result in Deerfield beneficially owning more that 4.985% of the Company’s outstanding common stock (the “Ownership Cap”). The Amended First Out Waterfall Notes also revises Deerfield’s existing right to convert a portion of the outstanding principal amount of the first-out waterfall loan into a maximum of 1,430,000 shares of the Company’s common stock at the current conversion price to Deerfield may, at its option, convert into 1,430,000 shares of common stock at the Discretionary Common Conversion Rate, or the equivalent number of shares of Preferred Stock at the Discretionary Preferred Conversion Rate. The Fourth Facility Amendment provides that, in the event that on or prior to the ninetieth (90th) day following the receipt of regulatory approval to sell the Company’s Ovation Alto Abdominal Stent Graft System (“Alto”) in the United States, but in any event no later than June 30, 2020, net sales of Alto shall be in excess of $1.0 million (the “Initial Exchange Condition”), Deerfield will exchange 8.333% (or approximately $10.7 million as of February 24, 2020) of the principal amount of the First Out Waterfall Notes, including any such principal that has resulted from payment-in-kind (“PIK”) interest payments made on or prior to such date, plus any accrued PIK interest thereon through such exchange date into shares of Preferred Stock (the “Initial Exchange”) at a rate equal to the Preferred Exchange Rate multiplied by $0.8282 (the “Floor Price”). In addition, upon consummation of the Initial Note Exchange, payment of the remaining portion of the First Amortization Payment will be extended until the Second Amortization Date (as defined in the Facility Agreement) and maturity date in accordance with the Facility Agreement. In addition, in the event that the Initial Exchange has occurred and the Company completes the first submission to the FDA of a full PMA application with respect to the Nellix EVAS System on or prior to September 30, 2021, Deerfield will exchange $2.5 million into shares of Preferred Stock (the “Nellix Submission Exchange”) at a rate (the “Conditional Exchange Rate”) equal to the product of the (i) Preferred Exchange Rate multiplied by (ii) the 85% of the lesser of (x) the Closing Price and (y) the 15 Day VWAP (the “Conditional Price”). In the event that the Initial Exchange and the Nellix Submission Exchange have occurred and the Company receives the PMA from the FDA with respect to the Nellix EVAS System as shall be necessary for the sale of the Nellix EVAS System in the United States on or prior to June 30, 2022 (the “Nellix Approval Exchange Condition”), Deerfield will exchange $7.5 million into shares of Preferred Stock (the “Nellix Approval Exchange”) at the Conditional Exchange Rate. In the event that the Initial Exchange, the Nellix Submission Exchange and the Nellix Approval Exchange have occurred and net sales of the Nellix EVAS System are in excess of $10.0 million within nine months of satisfaction of the Nellix Approval Exchange Condition, Deerfield will exchange $10.0 million into shares of Preferred Stock (the “Nellix Sales Exchange”) at the Conditional Exchange Rate. Notwithstanding the above, none of the foregoing exchanges shall take place if the Conditional Price at the time of such exchange is less than the Floor Price. The Fourth Facility Amendment provides that if, during the period beginning on the first business day following satisfaction of the Initial Exchange Condition and ending on the date that is three months thereafter, the Company completes an equity financing resulting in net proceeds to the Company of at least $5.0 million and subject to certain other conditions set forth in the Fourth Facility Amendment, then Deerfield will exchange $0.50 of principal of First Out Waterfall Notes for each $1 of net proceeds up to an aggregate of $20 million in net proceeds into shares of Preferred Stock at a rate equal to the Preferred Exchange Rate multiplied by the lowest price per share of common stock purchased in such financing, provided that such price per share is not less than the Floor Price. Deerfield would also receive the number of such other securities, if any, issued with each share of common stock sold in such financing for each as-converted share of Common Stock issued to Deerfield. Further, the Fourth Facility Amendment also provides, upon signing, the Company shall pay a restructuring fee of $2.0 million in cash or a combination of shares of common stock at the Floor Price and shares of Preferred Stock at a rate equal to the product of the Floor Price multiplied by the Preferred Exchange Rate. The Company elected to satisfy the fee by issuing 950,000 shares of common stock and 14,648.75 shares of Preferred Stock at signing. The Fourth Facility Amendment provides that, upon the satisfaction of the Initial Exchange Condition, the Company will amend the outstanding 2017 Deerfield Warrants and 2018 Deerfield Warrants to reduce the exercise price of the Warrants to $1.50. All other material terms and conditions of the 2017 Deerfield Warrants and 2018 Deerfield Warrants remain the same. The Fourth Facility Amendment also provides that, upon completion of the Initial Note Exchange, the remaining interest payments on the First Out Waterfall Notes will be due monthly. For 18 months beginning with the first calendar month following completion of the Initial Note Exchange the Company will, subject to certain conditions precedent, make such interest payments in shares of Preferred Stock at a rate equal to the product of (i) the Preferred Exchange Rate as of the interest payment date multiplied by (ii) ninety percent (90%) of the lesser of (a) the closing price on the date immediately preceding the interest payment date and (b) the 15 Day VWAP immediately preceding the interest payment date. Fourth Amendment to Credit Agreement On February 24, 2020, the Company entered into a Fourth Amendment to Credit Agreement (the “Credit Amendment”) with Deerfield Revolver and certain funds managed by Deerfield Management Company, L.P., dated as of August 9, 2018. The Credit Amendment includes conforming revisions to reflect the changes in the Fourth Facility Amendment. In addition, the Credit Amendment provides that if the Company satisfies the Maturity Extension Conditions, the credit agreement maturity date will extend to the earlier of (i) December 22, 2023 or (ii) the date the loans pursuant to the Facility Agreement have been repaid in full.

Subsequent Events

Convertible Note Exchange

On February 24, 2020, the Company and three investors holding approximately $11.0 million of the principal amount of the Company’s 3.25% Senior Notes due 2020 (the “Holders”) entered into an Exchange Agreement (the “2020 Exchange Agreement”) providing for the exchange of the Holders’ existing notes (the “Existing Notes”) for new 5.00% Voluntary Convertible Senior Notes due 2024 (the “2020 5.00% Voluntary Notes”). Pursuant to the 2020 Exchange Agreement, on February 24, 2020, the exchanging Holders are exchanging all outstanding principal plus accrued and unpaid interest under the Existing Notes into the same amount of principal of 2020 5.00% Voluntary Notes pursuant to the 2020 Exchange Agreement. The 2020 5.00% Voluntary Notes are being issued in a transaction exempt from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”) by virtue of Section 4(a)(2) of the Securities Act and Rule 506 thereunder.

The 2020 5.00% Voluntary Notes will be governed by an Indenture (the “New Indenture”), by and between the Company and Wilmington, as trustee. The 2020 5.00% Voluntary Notes will accrue interest at a rate of 5.00% per year, payable semi-annually in arrears on April 1 and October 1 of each year, commencing April 1, 2020. The 2020 5.00% Voluntary Notes will mature on April 2, 2024, unless earlier purchased, redeemed or converted in accordance with the terms of the New Indenture. The New Indenture governing the 2020 5.00% Voluntary Notes will contain customary terms and covenants and events of default.

The 2020 5.00% Voluntary Notes will be convertible at the option of each Holder into shares of common stock at any time prior to the close of business on the business day immediately preceding January 1, 2024; provided that, except if the Company undergoes a fundamental change (as defined in the New Indenture) and for certain other customary circumstances of conversion, each Holder may not convert more than 30% the initial aggregate principal amount of its outstanding 2020 5.00% Voluntary Notes per calendar quarter (a “Voluntary Conversion”). Beginning January 1, 2024, until the close of business on the business day immediately preceding the maturity date, the 2020 5.00% Voluntary Notes will be convertible at the option of the holder at any time regardless of the conditions described in this paragraph. The initial conversion rate of the 2020 5.00% Voluntary Notes in a Voluntary Conversion is 0.4445 shares of the Company’s common stock per $1.00 principal amount of the 2020 5.00% Voluntary Notes, which is equivalent to an initial conversion price per share equal to $2.25 (the “Conversion Price”). The conversion rate is subject to adjustment upon the occurrence of certain specified events. Except if the Company undergoes a fundamental change (as defined in the New Indenture) and for certain other customary circumstances of conversion, in no event prior to the close of business on the business day immediately preceding January 1, 2024 may the 2020 5.00% Voluntary Notes be converted in a calendar quarter unless the closing sale price of the Company’s common stock for at least twenty (20) trading days during the period of thirty (30) consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 110% of the Conversion Price (subject to adjustment upon the occurrence of certain specified events) (the “Voluntary Conversion Threshold”).

The 2020 5.00% Voluntary Notes will be secured by the Company’s assets pursuant to a Junior Lien Security Agreement by and between the Company and Wilmington, as collateral agent (the “JLSA”). The JLSA grants a second lien on the Company’s assets that is second in priority to the security interests granted (i)_to Deerfield, as agent, pursuant to the Amended and Restated Guaranty and Security Agreement, dated August 9, 2018, by and among the Company, its subsidiaries and Deerfield, as agent, as amended to date and (ii) to Deerfield ELGX Revolver, LLC, as agent (“Deerfield ELGX”), pursuant to the Guaranty and Security Agreement, dated as of August 9, 2018, by and among the Company, its subsidiaries and Deerfield ELGX, as agent. as amended to date. In connection with the issuance of the 2020 5.00% Voluntary Notes, the parties entered into Subordination and Intercreditor Agreement, dated as of February 24, 2020, by and among the Company, Deerfield, Deerfield ELGX and Wilmington, as collateral agent (the “Subordination Agreement”). The Subordination Agreement contains customary provisions associated with the subordination of the security interest of the 2020 5.00% Voluntary Notes.

The New Indenture will provide that in no event may a Holder convert into shares of common stock if such conversion would result in the Holder beneficially owning more that 9.5% of the Company’s outstanding common stock.

Exchange Agreement and Fourth Amendment to Facility Agreement

On February 24, 2020, the Company entered into a February 2020 Exchange Agreement and Fourth Amendment to Amended and Restated Facility Agreement and Amendment to First Out Waterfall Notes (the “Fourth Facility Amendment”) with Deerfield, dated August 9, 2018 (as amended to date, the “Fourth Facility Agreement”). The Facility Amendment provides for, among other things, the conversion of certain portions of the outstanding convertible debt upon the achievement of certain milestones. In addition, 8.333% (or approximately $10.7 million as of February 24, 2020) of the First Out Waterfall Notes currently due on the First Amortization Date (the “First Amortization Payment”) will be extended to July 1, 2021. In the event the Company satisfies the Initial Exchange Condition (as defined below) and provided that the Company reports net revenue of at least $142.5 million for the year ended December 31, 2020 and complies with the global excess liquidity requirement (the “Maturity Extension Conditions”), the maturity date shall be extended from April 2, 2023 to December 22, 2023 and the second amortization date shall be extended from April 2, 2022 to April 2, 2023. Further, the Fourth Facility Agreement provides that the interest payment date due April 1, 2020 will be payable in paid-in-kind interest by increasing the principal amount of the loans by an amount equal to the interest that has accrued.

The Fourth Facility Amendment provides for the exchange of the existing notes representing the First Out Waterfall Notes for amended notes (the “Amended First Out Waterfall Notes”). The Amended First Out Waterfall Notes reduced the Fixed Conversion Price under the existing notes from $6.625 to $2.00 (the “New Fixed Conversion Price”); provided that if the Initial Exchange Condition (as defined below) is not met by June 30, 2020, then such price shall revert to $6.625. The Amended First Out Waterfall Notes provide that the Company may require Deerfield to convert up to $40.0 million of principal amount (the “Forced Conversion Cap”) provided that the arithmetic average of the volume weighted average price of the Company’s common stock on each of the fifteen (15) consecutive trading days ending on the conversion date (the “Forced Conversion 15 Day VWAP”), and the closing price on the conversion date, is greater than 200% of the New Fixed Conversion Price into shares of the Company’s newly created Series DF-1 Preferred Stock, par value $0.001 per share (the “Preferred Stock”), at a price per share equal to the product of (i) the Preferred Exchange Rate (as defined below) and (ii) and 85% of the lesser of the closing price of the common stock on such conversion date (the “Closing Price”) and the Forced Conversion 15 Day VWAP, provided that such lesser price is greater than or equal to 170% of the New Fixed Conversion Price and other conditions are met (each such conversion, a “Forced Conversion”). A Forced Conversion may only occur once every 31 calendar days and any individual Forced Conversion may not exceed the lesser of (i) $3.5 million or (ii) the Forced Conversion Cap less any prior Forced Conversions or Discretionary Conversions (as defined below).

Deerfield also has the option to convert up to $60.0 million (less any amounts converted pursuant to Forced Conversions) of the Company’s outstanding debt (any such conversion, a “Discretionary Conversion”) into, at Deerfield’s option and subject to the Ownership Cap, shares of Common Stock at a rate equal to the greater of the New Fixed Conversion Price and 85% of the 15 Day VWAP, provided that such conversion price is not less than the Floor Price (the “Discretionary Common Conversion Rate”) or shares of Preferred Stock at a rate (the “Discretionary Preferred Conversion Rate”) equal to the product of (i) the Preferred Exchange Rate (as defined below) multiplied by (ii) the Discretionary Common Conversion Rate.

The Preferred Stock is convertible into common stock at an initial rate of 100 shares of common stock for each share of Preferred Stock, as may be adjusted pursuant to the Certificate of Designation of Preferences, Rights and Limitations of Series DF-1 Preferred Stock (the “Certificate of Designation”) (the “Preferred Exchange Rate”). Pursuant to the Certificate of Designation, 1,105,000 shares of Preferred Stock have been authorized for issuance. The Preferred Stock does not possess any voting rights. The Preferred Stock is subject to customary adjustments for stock events. The Preferred Stock provides that in no event may Deerfield convert the Preferred Stock into shares of common stock if such conversion would result in Deerfield beneficially owning more that 4.985% of the Company’s outstanding common stock (the “Ownership Cap”).

The Amended First Out Waterfall Notes also revises Deerfield’s existing right to convert a portion of the outstanding principal amount of the first-out waterfall loan into a maximum of 1,430,000 shares of the Company’s common stock at the current conversion price to Deerfield may, at its option, convert into 1,430,000 shares of common stock at the Discretionary Common Conversion Rate, or the equivalent number of shares of Preferred Stock at the Discretionary Preferred Conversion Rate.

The Fourth Facility Amendment provides that, in the event that on or prior to the ninetieth (90th) day following the receipt of regulatory approval to sell the Company’s Ovation Alto Abdominal Stent Graft System (“Alto”) in the United States, but in any event no later than June 30, 2020, net sales of Alto shall be in excess of $1.0 million (the “Initial Exchange Condition”), Deerfield will exchange 8.333% (or approximately $10.7 million as of February 24, 2020) of the principal amount of the First Out Waterfall Notes, including any such principal that has resulted from payment-in-kind (“PIK”) interest payments made on or prior to such date, plus any accrued PIK interest thereon through such exchange date into shares of Preferred Stock (the “Initial Exchange”) at a rate equal to the Preferred Exchange Rate multiplied by $0.8282 (the “Floor Price”). In addition, upon consummation of the Initial Note Exchange, payment of the remaining portion of the First Amortization Payment will be extended until the Second Amortization Date (as defined in the Facility Agreement) and maturity date in accordance with the Facility Agreement.

In addition, in the event that the Initial Exchange has occurred and the Company completes the first submission to the FDA of a full PMA application with respect to the Nellix EVAS System on or prior to September 30, 2021, Deerfield will exchange $2.5 million into shares of Preferred Stock (the “Nellix Submission Exchange”) at a rate (the “Conditional Exchange Rate”) equal to the product of the (i) Preferred Exchange Rate multiplied by (ii) the 85% of the lesser of (x) the Closing Price and (y) the 15 Day VWAP (the “Conditional Price”). In the event that the Initial Exchange and the Nellix Submission Exchange have occurred and the Company receives the PMA from the FDA with respect to the Nellix EVAS System as shall be necessary for the sale of the Nellix EVAS System in the United States on or prior to June 30, 2022 (the “Nellix Approval Exchange Condition”), Deerfield will exchange $7.5 million into shares of Preferred Stock (the “Nellix Approval Exchange”) at the Conditional Exchange Rate. In the event that the Initial Exchange, the Nellix Submission Exchange and the Nellix Approval Exchange have occurred and net sales of the Nellix EVAS System are in excess of $10.0 million within nine months of satisfaction of the Nellix Approval Exchange Condition, Deerfield will exchange $10.0 million into shares of Preferred Stock (the “Nellix Sales Exchange”) at the Conditional Exchange Rate. Notwithstanding the above, none of the foregoing exchanges shall take place if the Conditional Price at the time of such exchange is less than the Floor Price.

The Fourth Facility Amendment provides that if, during the period beginning on the first business day following satisfaction of the Initial Exchange Condition and ending on the date that is three months thereafter, the Company completes an equity financing resulting in net proceeds to the Company of at least $5.0 million and subject to certain other conditions set forth in the Fourth Facility Amendment, then Deerfield will exchange $0.50 of principal of First Out Waterfall Notes for each $1 of net proceeds up to an aggregate of $20 million in net proceeds into shares of Preferred Stock at a rate equal to the Preferred Exchange Rate multiplied by the lowest price per share of common stock purchased in such financing, provided that such price per share is not less than the Floor Price. Deerfield would also receive the number of such other securities, if any, issued with each share of common stock sold in such financing for each as-converted share of Common Stock issued to Deerfield.

Further, the Fourth Facility Amendment also provides, upon signing, the Company shall pay a restructuring fee of $2.0 million in cash or a combination of shares of common stock at the Floor Price and shares of Preferred Stock at a rate equal to the product of the Floor Price multiplied by the Preferred Exchange Rate. The Company elected to satisfy the fee by issuing 950,000 shares of common stock and 14,648.75 shares of Preferred Stock at signing.

The Fourth Facility Amendment provides that, upon the satisfaction of the Initial Exchange Condition, the Company will amend the outstanding 2017 Deerfield Warrants and 2018 Deerfield Warrants to reduce the exercise price of the Warrants to $1.50. All other material terms and conditions of the 2017 Deerfield Warrants and 2018 Deerfield Warrants remain the same.

The Fourth Facility Amendment also provides that, upon completion of the Initial Note Exchange, the remaining interest payments on the First Out Waterfall Notes will be due monthly. For 18 months beginning with the first calendar month following completion of the Initial Note Exchange the Company will, subject to certain conditions precedent, make such interest payments in shares of Preferred Stock at a rate equal to the product of (i) the Preferred Exchange Rate as of the interest payment date multiplied by (ii) ninety percent (90%) of the lesser of (a) the closing price on the date immediately preceding the interest payment date and (b) the 15 Day VWAP immediately preceding the interest payment date.

Fourth Amendment to Credit Agreement

On February 24, 2020, the Company entered into a Fourth Amendment to Credit Agreement (the “Credit Amendment”) with Deerfield Revolver and certain funds managed by Deerfield Management Company, L.P., dated as of August 9, 2018. The Credit Amendment includes conforming revisions to reflect the changes in the Fourth Facility Amendment. In addition, the Credit Amendment provides that if the Company satisfies the Maturity Extension Conditions, the credit agreement maturity date will extend to the earlier of (i) December 22, 2023 or (ii) the date the loans pursuant to the Facility Agreement have been repaid in full.