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Commitments and Contingencies | 6 Months Ended
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Jun. 30, 2021
Commitments And Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 5. Commitments and Contingencies Leases We lease our facilities in Emeryville, California and Düsseldorf, Germany. In July 2019, we entered into a sublease for office space located at 2100 Powell Street, Emeryville, California (the “Powell Street Sublease”) for our corporate headquarters. Under the terms of the Powell Street Sublease, we are leasing 23,976 square feet at the rate of $3.90 per square foot, paid on a monthly basis. Rent is subject to scheduled annual increases and we are responsible for certain operating expenses and taxes throughout the life of the Powell Street Sublease. The Powell Street Sublease will continue until June 30, 2022. There is no option to extend the sublease term. On September 17, 2018, we entered into a lease (“Horton Street Master Lease”) for office and laboratory space located at 5959 Horton Street, Emeryville, California (“Horton Street Premises”). Under the terms of the Horton Street Master Lease, we are leasing 75,662 square feet at the rate of $4.75 per square foot, paid on a monthly basis, starting on April 1, 2019 (“Commencement Date”). Rent is subject to scheduled annual increases, and we are also responsible for certain operating expenses and taxes throughout the life of Horton Street Master Lease. In connection with the Horton Street Master Lease, we have received tenant improvement allowance totaling $8.1 million through June 30, 2021. The Horton Street Master Lease has an initial term of 12 years, following the Commencement Date with an option to extend the lease for two successive five-year terms. The optional periods were not included in the lease term used in determining the right-of-use asset or the lease liability as we did not consider it reasonably certain that we would exercise the options. The operating lease right-of-use assets and liabilities on our June 30, 2021 condensed consolidated balance sheets primarily relate to the Horton Street Master Lease. Lease expense related to the Horton Street Master Lease is included in operating expense in our condensed consolidated statements of operations. In connection with the organizational restructuring in May 2019, we did not occupy the Horton Street Premises and in July 2019, we entered into an agreement to sublease the Horton Street Premises to a third party (“Horton Street Sublease”). Under the terms of the Horton Street Sublease, we are subleasing the entire 75,662 rentable square feet at the rate of $5.50 per square foot, paid on a monthly basis. Rent is subject to scheduled annual increases and the subtenant (“Subtenant”) is responsible for certain operating expenses and taxes throughout the life of the Horton Street Sublease. The Horton Street Sublease term is until March 31, 2031, unless earlier terminated, concurrent with the term of our Horton Street Master Lease. The Subtenant has no option to extend the sublease term. For the three and six months ended June 30, 2021, we recognized sublease income of $1.7 million and $3.7 million, respectively. For the three and six months ended June 30, 2020, we recognized sublease income of $1.9 million and $3.9 million, respectively. Sublease income is included in other income (expense) in our condensed consolidated statements of operations. Under the terms of the Horton Street Master Lease, rent received from the Subtenant in excess of rent paid to the landlord shall be shared by paying the landlord 50% of the excess rent. The excess rent is considered a variable lease payment and the total estimated payments are being recognized as additional rent expense on a straight-line basis. Our lease expense comprises of the following (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Operating lease expense |  | $ | 1,570 |  |  | $ | 1,561 |  |  | $ | 3,130 |  |  | $ | 3,153 |
Cash paid for amounts included in the measurement of lease liabilities for each of the six months ended June 30, 2021 and 2020 was $3.4 million and was included in change in lease liabilities in our condensed consolidated statement of cash flows. The balance sheet classification of our operating lease liabilities was as follows (in thousands):
|  | June 30, 2021 |  |  | December 31, 2020 |
Operating lease liabilities: |  |  |  |  |  |  |  |
Current portion of lease liabilities (included in other current liabilities) |  | $ | 3,489 |  |  | $ | 3,247 |
Long-term portion of lease liabilities |  |  | 32,897 |  |  |  | 34,789 |
Total operating lease liabilities |  | $ | 36,386 |  |  | $ | 38,036 |
At June 30, 2021, the maturities of our sublease income and operating lease liabilities were as follows (in thousands):
Years ending December 31, |  | Sublease Income |  |  | Operating Lease Liabilities |
2021 (remaining) |  | $ | 2,630 |  |  | $ | 3,486 |
2022 |  |  | 5,357 |  |  |  | 6,248 |
2023 |  |  | 5,518 |  |  |  | 5,384 |
2024 |  |  | 5,684 |  |  |  | 5,528 |
2025 |  |  | 5,854 |  |  |  | 5,677 |
Thereafter |  |  | 33,742 |  |  |  | 30,721 |
Total |  | $ | 58,785 |  |  |  | 57,044 |
Less: |  |  |  |  |  |  |  |
Present value adjustment |  |  |  |  |  |  | (20,658 | )
Total |  |  |  |  |  | $ | 36,386 |
The weighted average remaining lease term and the weighted average discount rate used to determine the operating lease liability were as follows:
|  | June 30, 2021 |  |  | December 31, 2020 |
Weighted average remaining lease term |  | 8.8 years |  |  | 9.1 years |
Weighted average discount rate |  |  | 10.1 | % |  |  | 10.1 | %
Commitments As of June 30, 2021, our material non-cancelable purchase and other commitments, for the supply of HEPLISAV-B, CpG 1018 and for clinical research, totaled $106.8 million. As of June 30, 2021, the aggregate principal amount of our Convertible Notes was $225.5 million, excluding debt discount of $5.5 million (see Note 7). The Convertible Notes mature on May 15, 2026, unless converted, redeemed or repurchased in accordance with their terms prior to such date. During 2004, we established a letter of credit with Deutsche Bank as security for our Düsseldorf lease in the amount of €0.2 million (Euros). The letter of credit remained outstanding through June 30, 2021 and is collateralized by a certificate of deposit for €0.2 million, which has been included in restricted cash in the consolidated balance sheets as of June 30, 2021. In conjunction with our agreement with Symphony Dynamo, Inc. and Symphony Dynamo Holdings LLC (“Holdings”) in November 2009, we agreed to make contingent cash payments to Holdings equal to 50% of the first $50 million from any upfront, pre-commercialization milestone or similar payments received by us from any agreement with any third party with respect to the development and/or commercialization of cancer and hepatitis C therapies originally licensed to Symphony Dynamo, Inc., including SD-101. In July 2020, we sold assets related to our SD-101 compound to TriSalus. We paid $2.5 million to Holdings in August 2020. We are obligated to pay Holdings 50% of the contingent pre-commercialization milestone payments that we may receive under the Asset Purchase Agreement. No liability has been recorded under this agreement as of June 30, 2021. Contingencies From time to time, we may be involved in claims, suits, and proceedings arising from the ordinary course of our business, including actions with respect to intellectual property claims, commercial claims, and other matters. Such claims, suits, and proceedings are inherently uncertain and their results cannot be predicted with certainty. Regardless of the outcome, such legal proceedings can have an adverse impact on us because of legal costs, diversion of management resources, and other factors. In addition, it is possible that a resolution of one or more such proceedings could result in substantial damages, fines, penalties or orders requiring a change in our business practices, which could in the future materially and adversely affect our financial position, results of operations, or cash flows in a particular period.

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