Thanks, Todd. During this discussion of our financial results, I will reference certain non-GAAP financial measures. These non-GAAP financial measures exclude stock-based compensation, depreciation, and non-cash interest expense. For a full reconciliation of our GAAP to non-GAAP financial measures, please refer to today's press release which is available on our website. This morning, we announced that we have further strengthened our cash position by entering into a new five-year, $125 million credit facility with Oxford Finance replacing our existing $75 million facility. The terms of the new facility provides for an initial tranche of $80 million with the ability to borrow two additional tranches totaling $45 million based on meeting certain revenue targets. The terms also eliminate the minimum cash balance required under our previous facility resulting in additional cash on our balance sheet of $10 million. Principal payments will begin in December 2024 at the earliest for two years beyond our previous facility. Additional information regarding the new credit facility is available in the 8-K, we filed this morning. As Mark mentioned, we believe this will allow us to invest in our company as we continue to establish our marketed products and advance our preclinical pipeline. Based on our current operational plans, we anticipate that our cash resources as of march 31, 2021 along with anticipated revenue from EYSUVIS and INVELTYS will enable us to fund operations for at least the next two years. Now turning to a recap of the first quarter of 2021, our cash position as of march 31, 2021, is $156 million compared to $153.5 million as of December 31, 2021. This increase primarily reflects net proceeds of $34.7 million received from sales of common stock under our At-The-Market or ATM offering program in the three months ended March 31, 2021, partially offset by cash used in operations. For the period ending March 31, 2021, we reported net product revenues of $3.3 million. This is comprised of $1.63 million from net revenues from INVELTYS sales and $1.64 million of net revenues for EYSUVIS sales. Net product revenues from INVELTYS sales increased approximately $500,000 compared to the first quarter of 2020 in which we reported $1.1 billion from sales in INVELTYS. As a reminder, we recognize revenue when product is shipped to wholesalers. Cost of product revenues for the first quarter of 2021 was $800,000 compared to $400,000 for the same period in 2020. The increase was primarily due to the launch of EYSUVIS during the quarter as well as an increase in total INVELTYS units sold during the three months ended March 31, 2021 compared to the three months ended March 31, 2020. Non-GAAP cost of product revenues was $700,000 for the first quarter of 2021 compared to $300,000 for the same period in 2020. SG&A expenses for the first quarter of 2021 were $27.7 million compared to $15.4 million for the same period in 2021. The increase was primarily due to an increase in costs as a result of the launch of EYSUVIS including expansion of the sales force and increased stock-based compensation costs. Non-GAAP SG&A expenses were $23.8 million for the first quarter of 2021 compared to $13.5 million dollars for the same period in 2020. R&D expenses for the first quarter of 2021 were $3.1 million compared to $5.4 million for the same period in 2020. This decreases was primarily due to a decrease in external spend on STRIDE3 or Phase 3 clinical trial of EYSUVIS, for which we announced positive data in the first quarter of 2020. Non-GAAP R&D expenses were $2.1 million for the first quarter of 2021 compared to $4.6 million for the same period in 2020. Loss from operations for the first quarter of 2021 was $28.3 million compared to $20.1 million for the same period in 2020. Non-GAAP operating loss was $23.4 million for the first quarter of 2021 compared to $17.4 million for the same period in 2020. Net loss for the first quarter of 2021 was $30.4 million or $0.49 per share compared to a net loss of $22 million or $0.54 per share for the same period in 2020. Non-GAAP net loss was $25.2 million for the first quarter of 2021 compared to $19 million for the same period in 2020. Please refer to today's press release for the weighted average, number of shares used in the calculation of our net loss per share for each of the quarterly periods discussed. That concludes our prepared remarks for today. I will now pass the call over to the operator for questions.