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Leases | 9 Months Ended
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Sep. 30, 2020
Leases [Abstract] |
Leases | 7. Leases In December 2019, we amended our existing operating lease for laboratory and office space in San Diego, California to expand the office space by an additional 21,180 square feet (“Lease Amendment”). The Lease Amendment commenced on January 1, 2020 and expires on December 31, 2025. We have an option to extend the lease for an additional 5 years on expiration. As of September 30, 2020, our operating lease for laboratory and office space in San Diego, California had a remaining lease term of 63 months. On January 1, 2019, on the adoption of Topic 842, we recognized initial ROU lease assets of $13.7 million and initial lease liabilities of $14.5 million. The option to extend our operating lease in San Diego was not recognized as part of our lease liability and ROU lease assets. During the three and nine months ended September 30, 2020, we recognized $0.9 million and $2.9 million, respectively, of operating lease expense and we paid $1.0 million and $2.7 million, respectively, for our operating leases. Future minimum lease payments under our operating leases as of September 30, 2020 are as follows (in thousands):
2020 |  | $ | 966 |
2021 |  |  | 3,942 |
2022 |  |  | 4,058 |
2023 |  |  | 4,178 |
2024 |  |  | 4,274 |
Thereafter |  |  | 4,379 |
Total future minimum lease payments |  | $ | 21,797 |
Less: discount |  |  | (3,587 | )
Total lease liabilities |  | $ | 18,210 |

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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