Subsequent Events	6 Months Ended
Jun. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Conversion of 2014 Convertible Notes On July 23, 2018, Aerie entered into an Exchange and Termination Agreement (the “Exchange and Termination Agreement”) with Deerfield Private Design Fund III, L.P., Deerfield Partners, L.P. and Deerfield Special Situations Fund, L.P. (collectively, the “Holders”). Pursuant to the Exchange and Termination Agreement, (i) the Holders converted the entire outstanding principal amount of the 2014 Convertible Notes into 5,040,323 shares of Common Stock (the “Conversion Shares”) in accordance with the terms of the 2014 Convertible Notes, (ii) Aerie issued the Conversion Shares, and (iii) Aerie paid accrued and unpaid interest on the Convertible Notes through July 23, 2018. In addition, as mutually agreed to with the Holders in order to complete the conversion on the date of the Exchange and Termination Agreement, Aerie issued an additional 329,124 shares of Common Stock (the “Additional Shares”) to the Holders. Aerie expects to expense the value of the Additional Shares in the amount of approximately $24 million during the third quarter of 2018. Entry into Credit Facility On July 23, 2018, Aerie entered into a credit agreement (as amended on August 7, 2018) with certain entities affiliated with Deerfield Management Company L.P. providing for a $100 million senior secured delayed draw term loan facility (the “credit facility”). The credit facility includes fees upon drawdown of 1.75% of amounts drawn, an 8.625% annual interest rate on drawn amounts, and annual fees on undrawn amounts of 1.5%. The allowable draw period ends two years from the effective date of the credit facility. Fees on undrawn amounts accrue but are not payable until July 23, 2020, and no principal payments will be due on drawn amounts, if any, until July 23, 2020. The credit facility matures on July 23, 2024. The credit facility has certain covenants and prepayment provisions and may be terminated by Aerie at any time for a one-time fee of $1.5 million. No funds were drawn at closing. Collaboration Agreement with DSM On August 1, 2018, the Company announced that it entered into an Amended and Restated Collaborative Research, Development, and License Agreement with DSM (the “Collaboration Agreement”), which provides for (i) a worldwide exclusive license for all ophthalmic indications to DSM’s polyesteramide polymer technology, (ii) continuation of the collaborative research initiatives through the end of 2020, including the transfer of DSM’s formulation technology to Aerie during that time and (iii) access to a preclinical latanoprost implant. Aerie paid $6.0 million to DSM upon execution of the Collaboration Agreement, with an additional $9.0 million payable to DSM through the end of 2020. The Collaboration Agreement also includes contingent payments that may be due to DSM upon the achievement of certain development and regulatory milestones. Aerie would also pay royalties to DSM when products are commercialized under this Collaborative Agreement, if any.

Subsequent Events

Conversion of 2014 Convertible Notes

On July 23, 2018, Aerie entered into an Exchange and Termination Agreement (the “Exchange and Termination Agreement”) with Deerfield Private Design Fund III, L.P., Deerfield Partners, L.P. and Deerfield Special Situations Fund, L.P. (collectively, the “Holders”). Pursuant to the Exchange and Termination Agreement, (i) the Holders converted the entire outstanding principal amount of the 2014 Convertible Notes into 5,040,323 shares of Common Stock (the “Conversion Shares”) in accordance with the terms of the 2014 Convertible Notes, (ii) Aerie issued the Conversion Shares, and (iii) Aerie paid accrued and unpaid interest on the Convertible Notes through July 23, 2018.

In addition, as mutually agreed to with the Holders in order to complete the conversion on the date of the Exchange and Termination Agreement, Aerie issued an additional 329,124 shares of Common Stock (the “Additional Shares”) to the Holders. Aerie expects to expense the value of the Additional Shares in the amount of approximately $24 million during the third quarter of 2018.

Entry into Credit Facility

On July 23, 2018, Aerie entered into a credit agreement (as amended on August 7, 2018) with certain entities affiliated with Deerfield Management Company L.P. providing for a $100 million senior secured delayed draw term loan facility (the “credit facility”). The credit facility includes fees upon drawdown of 1.75% of amounts drawn, an 8.625% annual interest rate on drawn amounts, and annual fees on undrawn amounts of 1.5%. The allowable draw period ends two years from the effective date of the credit facility. Fees on undrawn amounts accrue but are not payable until July 23, 2020, and no principal payments will be due on drawn amounts, if any, until July 23, 2020. The credit facility matures on July 23, 2024. The credit facility has certain covenants and prepayment provisions and may be terminated by Aerie at any time for a one-time fee of $1.5 million. No funds were drawn at closing.

Collaboration Agreement with DSM

On August 1, 2018, the Company announced that it entered into an Amended and Restated Collaborative Research, Development, and License Agreement with DSM (the “Collaboration Agreement”), which provides for (i) a worldwide exclusive license for all ophthalmic indications to DSM’s polyesteramide polymer technology, (ii) continuation of the collaborative research initiatives through the end of 2020, including the transfer of DSM’s formulation technology to Aerie during that time and (iii) access to a preclinical latanoprost implant. Aerie paid $6.0 million to DSM upon execution of the Collaboration Agreement, with an additional $9.0 million payable to DSM through the end of 2020. The Collaboration Agreement also includes contingent payments that may be due to DSM upon the achievement of certain development and regulatory milestones. Aerie would also pay royalties to DSM when products are commercialized under this Collaborative Agreement, if any.