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Commitments and Contingencies | 3 Months Ended
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Mar. 31, 2019
Commitments And Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 11. Commitments and Contingencies Collaborative Agreements, Royalties and Milestone Payments The Company has committed to make potential future milestone payments to third parties as part of licensing and development programs. Payments under these agreements become due and payable only upon the achievement of certain developmental, regulatory and commercial milestones by the Company’s licensees. Because it is uncertain if and when these milestones will be achieved, such contingencies, aggregating up to $7.6 million have not been recorded on the accompanying condensed consolidated balance sheets. The Company is unable to determine precisely when and if payment obligations under the agreements will become due as these obligations are based on milestone events, the achievement of which is subject to a significant number of risks and uncertainties. Contingent Consideration Pursuant to the Bioasis Royalty Purchase Agreement, the Company has committed to pay contingent consideration of up to $0.2 million to Bioasis as the licensed product candidates reach certain development milestones. The Company recorded the contingent consideration at $0.1 million, which represents the estimated fair value of potential future payments at the inception of the agreement. The contingent consideration will be remeasured at fair value at each reporting period, with changes in fair value recorded in other income (expense), net. Lease Agreements The Company leases two facilities in Berkeley, California under operating leases that have a remaining lease term ranging from two to four years. The Company also leases one facility in Emeryville, California under an operating lease that expires in February 2023. The Emeryville lease contains both an option to early terminate the lease and an option to extend the lease for an additional term, however, the Company is not reasonably assured to exercise either option. During 2018, the Company completely vacated both of its leased facilities in Berkeley, California and consolidated all of its personnel in the office facility in Emeryville, California. The Company subleased the leased space in the vacated buildings to four subtenants as of March 31, 2019. As of March 31, 2019, the Company recognized right-of-use assets and lease liabilities for all three operating leases. The maturity of the Company’s operating lease liabilities as of March 31, 2019 is as follows (in thousands):
|  | Operating |
Undiscounted lease payments |  | Leases |
2019 (excluding the three months ended March 31, 2019) |  | $ | 1,980 |
2020 |  |  | 2,736 |
2021 |  |  | 2,268 |
2022 |  |  | 1,943 |
2023 |  |  | 620 |
Total undiscounted lease payments |  |  | 9,547 |
Present value adjustment |  |  | (899 | )
Total net lease liabilities |  | $ | 8,648 |
The Company’s future undiscounted lease payments under operating leases (as defined by prior guidance) as of December 31, 2018 are as follow (in thousands):
Year Ending December 31, |  | Rent Payments |
2019 |  | $ | 4,381 |
2020 |  |  | 3,923 |
2021 |  |  | 3,156 |
2022 |  |  | 2,611 |
2023 |  |  | 854 |
Thereafter |  |  | — |
Total minimum lease payments |  | $ | 14,925 |
Rent expense recognized for operating leases was $0.6 million for the three months ended March 31, 2019. Under the terms of the lease agreements, the Company is also responsible for certain variable lease payments that are not included in the measurement of the lease liability. Variable lease payments for operating leases were $0.6 million for the three months ended March 31, 2019, including non-lease components such as common area maintenance fees. The following information represents supplemental disclosure for the statement of cash flows related to operating leases (in thousands):
|  | March 31, |
|  | 2019 |
Cash paid for amounts included in the measurement of lease liabilities |  |  |  |
Operating cash flows from operating leases |  | $ | 649 |
The following summarizes additional information related to operating leases (in thousands):
|  | March 31, |
|  | 2019 |
Weighted-average remaining lease term |  |  |  |
Operating leases |  | 3.66 years |
Weighted-average discount rate |  |  |  |
Operating leases |  |  | 5.51 | %
Sublease Agreements On November 21, 2017, the Company entered into a non-cancellable sublease agreement for a portion of one of its three leased facilities. The term of the sublease agreement commenced on December 26, 2017. Under the term of the sublease agreement, the Company will receive $5.1 million in base lease payments plus reimbursement of certain operating expenses over the term of the sublease, which ends at the same time as the original lease in April 2023. Under the sublease agreement, the Company’s future sublease income will be equal to the amount required to be paid to the Company’s landlord. In addition, the sublease provides for a tenant improvement allowance of $0.8 million to the subtenant, which was funded by the Company in January 2018. Upon execution of the sublease agreement, the Company recognized a loss on the sublease equal to the tenant improvement allowance. Under the sublease agreement, the sub-lessee executed a standby letter of credit naming the Company as the beneficiary amounting to $1.0 million as security under the sublease in the event of uncured default by the sub-lessee. As of March 31, 2019, the Company has not drawn any funds from the letter of credit as there was no default by the sub-lessee. During the three months ended March 31, 2019 and 2018, the Company recognized $0.4 million of sublease income under this agreement. On April 14, 2018, the Company entered into a non-cancellable sublease agreement for a portion of one of its three leased facilities. The term of the sublease agreement commenced on May 1, 2018. Under the term of the sublease agreement, the Company will receive $1.1 million in base lease payments plus reimbursement of certain operating expenses over the term of the sublease, which ends at the same time as the original lease in April 2023. Under the sublease agreement, the Company’s future sublease income is less than the amount required to be paid to the Company’s landlord. In addition, the sublease provides for a tenant improvement allowance of $65,000 to the subtenant, and payment of broker commissions of $89,000. Upon execution of the sublease agreement, the Company recognized a loss on the sublease of $0.6 million, which was recorded in the restructuring charges line item of the condensed consolidated statement of operations and comprehensive loss during the three months ended June 30, 2018 (see Note 8). During the three months ended March 31, 2019, the Company recognized $0.1 million of sublease income under this agreement. In October 2018, the Company entered into a non-cancellable sublease agreement for a portion of one of its three leased facilities. The term of the sublease agreement commenced on October 24, 2018. Under the term of the sublease agreement, the Company will receive $1.7 million in base lease payments over the term of the sublease, which ends at the same time as the original lease in May 2021. In addition, the sublease provides for payment of broker commissions of $137,000. During the three months ended March 31, 2019, the Company recognized $0.2 million of sublease income under this agreement. In January 2019, the Company entered into a non-cancellable sublease agreement for a portion of one of its three leased facilities. The term of the sublease agreement commenced on January 18, 2019. Under the term of the sublease agreement, the Company will receive $1.7 million in base lease payments over the term of the sublease, which ends at the same time as the original lease in April 2023. In addition, the sublease provides for a tenant improvement allowance of $91,000 to the subtenant, and payment of broker commissions of $53,000. During the three months ended March 31, 2019, the Company recognized $0.1 million of sublease income under this agreement. The Company’s future cash flows to be received from subleases as of March 31, 2019 and December 31, 2018 is as follows (in thousands):
|  | March 31, |
Sublease income |  | 2019 |
2019 (excluding the three months ended March 31, 2019) |  | $ | 1,668 |
2020 |  |  | 2,280 |
2021 |  |  | 1,906 |
2022 |  |  | 1,644 |
2023 |  |  | 556 |
Total minimum lease payments |  | $ | 8,054 |
|  | December 31, |
Sublease income |  | 2018(1) |
2019 |  | $ | 2,249 |
2020 |  |  | 2,376 |
2021 |  |  | 2,006 |
2022 |  |  | 1,746 |
2023 |  |  | 592 |
Total minimum lease payments |  | $ | 8,969 |
| (1) | Sublease income as of December 31, 2018 includes base lease payments and expected reimbursement of certain operating expenses under executed sublease agreements.

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