On April 8, 2020, the Company applied to Silicon Valley Bank (the “SVB”) for a Paycheck Protection Program Loan (the “PPP Loan”) of $2.0 million that is administered by the U.S. Small Business Administration (the “SBA”), under the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”). On April 22, 2020, the PPP Loan was approved and the Company received the PPP Loan proceeds.

The PPP Loan bears interest at a fixed rate of 1.0% per annum and has a two-year term that matures on April 21, 2022. Monthly principal and interest are payable commencing on November 21, 2020, subject to possible partial or full forgiveness and principal and interest payments can be deferred as described below, if the PPP Loan proceeds are used for covered payroll costs, rent and utility costs and the maintenance of employee and compensation levels.

The Paycheck Protection Program Flexibility Act of 2020 (the “PPP Flexibility Act”), enacted on June 5, 2020, amended the Paycheck Protection Program, among others, as follows: (i) extended the covered period from 8 weeks to the earlier of 24 weeks from the date the PPP Loan is originated and December 31, 2020, during which PPP funds needed to be expended in order to be forgiven. A borrower may submit a loan forgiveness application any time on or before the maturity date of the loan – including before the end of the covered period – if the borrower has used all of the loan proceeds for which the borrower is requesting forgiveness; (ii) at least 60% of PPP funds must be spent on payroll costs, with the remaining 40% available to spend on other eligible expenses; (iii) payments are deferred until the date on which the amount of forgiveness determined is remitted to the lender. If a borrower fails to seek forgiveness within 10 months after the last day of its covered period, then payments will begin on the date that is 10 months after the last day of the covered period. In addition, the PPP Flexibility Act modified the CARES Act by increasing the maturity date for loans made after the effective date from two years to a minimum maturity of five years from the date on which the borrower applies for loan forgiveness. Existing PPP loans made before the new legislation retain their original two-year term, but may be renegotiated between a lender and a borrower to match the 5-year term permitted under the PPP Flexibility Act.

The Company used all of the loan proceeds from the PPP Loan to pay expenses during the covered period that the Company believes were for eligible purposes. On September 25, 2020, the Company submitted an application to the SBA through SVB for full loan forgiveness. No assurance is provided that the Company will obtain forgiveness of the PPP Loan in whole or in part. As of the date of this filing, the application for the PPP Loan forgiveness is still under review by the SBA.

The PPP Loan proceeds of $2.0 million were recorded as a loan in accordance with ASC 470, Debt, and included in long-term debt in the Company’s balance sheet as of March 31, 2021. Accrued interest expense based on the stated interest rate of 1% per annum was $5,000 for the three months ended March 31, 2021.

On February 13, 2019 (the “CRG Closing Date”), the Company entered into the CRG Loan Agreement among the Company, as borrower, CRG Servicing LLC, as administrative agent and collateral agent (the “Agent”), and the lenders party thereto from time to time (the “Lenders”), providing for a senior secured term loan of up to $60 million (the “CRG Loan”). On the CRG Closing Date, $35 million of the CRG Loan was advanced (the “CRG Initial

Advance”). The Company utilized the proceeds from the CRG Initial Advance for the repayment in full of all outstanding obligations under its prior credit agreement (the “SWK Credit Agreement”) with SWK Funding LLC (“SWK”). In April 2019, the Company exercised its option to borrow an additional $15 million of the CRG Loan (the “CRG Second Advance”). The Company did not draw any additional funds under the CRG Loan by the final draw deadline of March 31, 2020.

The CRG Loan is due and payable on December 31, 2023 (the “Maturity Date”). The CRG Loan bears interest at a fixed rate of 12.5% per annum payable in arrears on the last business day of each calendar quarter. The Company is required to make quarterly, interest only payments until the Maturity Date. So long as no default has occurred and is continuing, the Company may elect on each applicable interest payment date to pay 2.5% of the 12.5% per annum interest as Paid In-Kind (“PIK”), whereby such PIK amount would be added to the aggregate principal amount and accrue interest at 12.5% per annum. During the three months ended March 31, 2021, no PIK amounts had been added to the principal balance of the CRG Loan. In addition, the Company is required to pay an upfront fee of 1.5% of amounts borrowed under the CRG Loan (excluding any paid-in-kind amounts), which is payable as amounts are advanced under the CRG Loan. The Company will also be required to pay an exit fee equal to 6% of (i) the aggregate principal amounts advanced and (ii) PIK amounts issued, under the CRG Loan Agreement. In connection with the CRG Initial Advance, a 1.5% financing fee of $525,000 and an expense reimbursement of $350,000 were deducted from the net borrowing proceeds. In connection with the CRG Second Advance, a 1.5% financing fee of $225,000 was deducted from the net borrowing proceeds.

Upon the occurrence of a bankruptcy-related event of default, all amounts outstanding with respect to the CRG Loan become due and payable immediately, and upon the occurrence of any other Event of Default (as defined in the CRG Loan Agreement), all or any amounts outstanding with respect to the CRG Loan may become due and payable upon request of the Agent or majority Lenders. Subject to certain exceptions, the Company is required to make mandatory prepayments of the CRG Loan with the proceeds of assets sales and in the event of a change of control of the Company. In addition, the Company may make a voluntary prepayment of the CRG Loan, in whole or in part, at any time. All mandatory and voluntary prepayments of the CRG Loan are subject to the payment of prepayment premiums as follows: (i) if prepayment occurs on or prior to December 31, 2019, an amount equal to 10% of the aggregate outstanding principal amount of the CRG Loan being prepaid, (ii) if prepayment occurs after December 31, 2019 and on or prior to December 31, 2020, 5% of the aggregate outstanding principal amount of the CRG Loan being prepaid, which was waived on December 17, 2020 when the Company paid $15.0 million against the CRG Loan obligations in connection with the consummation of the RPA agreement (see Note 3), and (iii) if prepayment occurs after December 31, 2020 and on or prior to December 31, 2021, an amount equal to 3% of the aggregate outstanding principal amount of the CRG Loan being prepaid. No prepayment premium is due on any principal prepaid after December 31, 2021. Certain of the Company’s existing and future subsidiaries are guaranteeing the obligations of the Company under the CRG Loan Agreement. The obligations of the Company under the CRG Loan Agreement and the guarantee of such obligations are secured by a pledge of substantially all of the Company’s and the guarantors’ assets.

The CRG Loan Agreement contains affirmative and negative covenants customary for financings of this type, including limitations on our and our subsidiaries’ abilities, among other things, to incur additional debt, grant or permit additional liens, make investments and acquisitions, merge or consolidate with others, dispose of assets, pay dividends and distributions and enter into affiliate transactions, in each case, subject to certain exceptions. In addition, the CRG Loan Agreement contains the following financial covenants requiring the Company and the Guarantors to maintain:

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liquidity in an amount which shall exceed the greater of (i) $5 million and (ii) to the extent the Company has incurred certain permitted debt, the minimum cash balance, if any, required of the Company by the creditors of such permitted debt; and

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annual minimum product revenue from YUTIQ and DEXYCU: (i) for the twelve-month period beginning on January 1, 2019 and ending on December 31, 2019, of at least $15 million, (ii) for the twelve-month period beginning on January 1, 2020 and ending on December 31, 2020, of at least $45 million, (iii) for the twelve-month period beginning on January 1, 2021 and ending on December 31, 2021, of at least $80 million and (iv) for the twelve-month period beginning on January 1, 2022 and ending on December 31, 2022, of at least $90 million.

In November 2019, CRG waived the financial covenant associated with the Company’s revenue derived from sales of its products, DEXYCU and YUTIQ, for the twelve-month period ending December 31, 2019. In October 2020, CRG (i) waived the financial covenant associated with the Company’s revenue derived from sales of its products, DEXYCU and YUTIQ, for the twelve-month period ending December 31, 2020 and (ii) amended the financial

covenant associated with the Company’s minimum product revenue to $45 million from $80 million, for the twelve-month period ending December 31, 2021. In May 2021, CRG further amended the financial covenant associated with the Company’s minimum product revenue to $25 million from $45 million, for the twelve-month period ending December 31, 2021. There were no other material changes to the CRG Loan Agreement and the Company incurred no incremental charges for the issuance of the waivers.

The total debt discount related to the CRG Initial Advance was approximately $3.2 million and consisted of (i) the accrual of a $2.1 million exit fee; (ii) the $525,000 upfront fee; and (iii) $591,000 of legal and other transaction costs. This amount is being amortized as additional interest expense over the term of the Loan using the effective interest rate method.

The total debt discount related to the CRG Second Advance was approximately $1.1 million and consisted of (i) the accrual of a $900,000 exit fee; and (ii) the $225,000 upfront fee. This amount is being amortized as additional interest expense over the term of the Loan using the effective interest rate method.

On December 17, 2020, the Company paid $15.0 million against the CRG Loan obligations in connection with the consummation of the RPA agreement (see Note 3). This payment included (i) a $13.8 million principal portion of the CRG Loan (ii) the $828,000 Exit Fee, and (iii) accrued and unpaid interest of $378,000 through that date. In connection with the partial prepayment of the CRG Loan, the Company recorded a loss on partial extinguishment of debt of $905,000 in the year ended December 31, 2020, associated with the write-off of the remaining balance of unamortized debt discount related to the partial prepayment of the CRG Loan.

Amortization of debt discount under the CRG Loan totaled $147,000 and $171,000 for the three months ended March 31, 2021 and 2020, respectively.