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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract] |
Commitments and Contingencies |
6. | Commitments and Contingencies
Leases During 2021, we had an operating lease for 73,328 square feet of laboratory and office space in San Diego, California. In October 2021, we entered into a lease amendment to reduce the amount of laboratory and office space in San Diego, California by 21,180 square feet. The corresponding reduction of leased space was effective November 1, 2021. In addition, in October 2021, we entered into a sublease agreement to sublet 23,873 square feet of laboratory and office space in San Diego, California, which is anticipated to be delivered to the subtenant on or before May 1, 2022. The sublease agreement expires on December 31, 2025 and is coterminous with the operating lease for the subleased space. As of December 31, 2021, we had an operating lease for 52,148 square feet of laboratory and office space in San Diego, California, with a lease term that expires on December 31, 2025. As a result of the sublease agreement, our one 5-year option to renew the lease on expiration applies only with respect to our remaining 28,275 square feet of laboratory and office space. During the year ended December 31, 2021, we paid $3.8 million for our operating lease. We leased 26,067 square feet of laboratory, office and warehouse space in Redwood City, California. The lease for the Redwood City space expired in May 2019. In March 2018, we entered into a sublease agreement for the Redwood City property. The sublease agreement expired in May 2019. We also leased 1,898 square feet of office space in Jersey City, New Jersey. The lease for the Jersey City office space expired in December 2019. Annual future minimum lease payments as of December 31, 2021 are as follows (in thousands):
Year ended December 31: |  |  |  |
2022 |  | $ | 2,885 |
2023 |  |  | 2,970 |
2024 |  |  | 3,030 |
2025 |  |  | 3,097 |
2026 |  |  | — |
Thereafter |  |  | — |
Total future minimum lease payments |  |  | 11,982 |
Less: discount |  |  | (1,569 | )
Total lease liabilities |  | $ | 10,413 |
Rent expense under all operating leases totaled $3.7 million, $3.9 million and $3.1 million for the years ended December 31, 2021, 2020 and 2019, respectively. Development Agreements We enter into agreements with clinical sites and clinical research organizations for the conduct of our clinical trials and contract manufacturing organizations for the manufacture and supply of preclinical, clinical and commercial materials and drug product. We make payments to these clinical sites and clinical research organizations based in part on the number of eligible patients enrolled and the length of their participation in the clinical trials. In some of our agreements with contract manufacturing organizations, we are required to meet minimum purchase obligations. Under certain of these agreements, we may be subject to penalties in the event that we prematurely terminate these agreements. At this time, due to the variability associated with clinical site agreements, contract research organization agreements and contract manufacturing agreements, we are unable to estimate with certainty the future costs we will incur. We intend to use our current financial resources to fund our obligations under these commitments. Purchase Obligations At December 31, 2021, purchase obligations primarily consisted of non-cancellable commitments with third-party manufacturers in connection with the manufacturing of our commercial products. Total purchase obligations of $98.7 million were not included in our consolidated financial statements for the year ended December 31, 2021 and are due within one to two years.

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