Subsequent Event	12 Months Ended
Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Event	16. Subsequent Event On March 10, 2020, the Company entered into a License Agreement (the “License Agreement”) with Arctic Vision (Hong Kong) Limited (“Arctic Vision”). Pursuant to the License Agreement, the Company has granted an exclusive license to Artic Vision to develop, distribute, promote, market and commercialize XIPERE, the Company’s proprietary suspension of the corticosteroid triamcinolone acetonide formulated for administration to the back of the eye using the Company’s proprietary SCS Microinjector, subject to specified exceptions, in China, Hong Kong, Macau, Taiwan and South Korea (the “Territory”). Under the terms of the License Agreement, neither party may commercialize XIPERE in the other party’s territory and Arctic Vision may pursue development and commercialization of XIPERE for indications associated with uveitis or, upon receipt of the Company’s consent, additional indications. Pursuant to the License Agreement, Arctic Vision has agreed to pay the Company up to a total of $35.5 million. This amount includes an upfront payment of $4.0 million as well as an aggregate of up to $31.5 million in development milestone payments for specified events prior to and including receipt of approval of XIPERE in the United States and sales milestone payments for achievement of specified levels of net sales. Further, during the applicable royalty term, the Company will also be entitled to receive tiered royalties of ten to twelve percent of net sales based on achieving certain annual net sales thresholds in the Territory, subject to customary reductions in specified circumstances.

Subsequent Event

12 Months Ended

Dec. 31, 2019

16. Subsequent Event

On March 10, 2020, the Company entered into a License Agreement (the “License Agreement”) with Arctic Vision (Hong Kong) Limited (“Arctic Vision”). Pursuant to the License Agreement, the Company has granted an exclusive license to Artic Vision to develop, distribute, promote, market and commercialize XIPERE, the Company’s proprietary suspension of the corticosteroid triamcinolone acetonide formulated for administration to the back of the eye using the Company’s proprietary SCS Microinjector, subject to specified exceptions, in China, Hong Kong, Macau, Taiwan and South Korea (the “Territory”). Under the terms of the License Agreement, neither party may commercialize XIPERE in the other party’s territory and Arctic Vision may pursue development and commercialization of XIPERE for indications associated with uveitis or, upon receipt of the Company’s consent, additional indications.

Pursuant to the License Agreement, Arctic Vision has agreed to pay the Company up to a total of $35.5 million. This amount includes an upfront payment of $4.0 million as well as an aggregate of up to $31.5 million in development milestone payments for specified events prior to and including receipt of approval of XIPERE in the United States and sales milestone payments for achievement of specified levels of net sales. Further, during the applicable royalty term, the Company will also be entitled to receive tiered royalties of ten to twelve percent of net sales based on achieving certain annual net sales thresholds in the Territory, subject to customary reductions in specified circumstances.