8. Commitments and Contingencies

Operating leases

The Company leases office and laboratory space in Monrovia, CA through June 2020. In July 2017, the Company entered into an amended lease agreement for additional space in the same building. The amended lease has a 64-month term with an option to renew for an additional five years. The lease terms for the original space were not amended.

The Company also leases office space in San Diego, CA through June 2020. In June 2017, the Company entered into a new lease agreement for an additional office space. The new lease has a 61-month term beginning from the date of occupancy and includes an option to renew for an additional five years. At December 31, 2018 the future minimum lease payments under the operating leases were as follows:


	Operating
Years ending December 31,	Leases
2019	$	2,752
2020		2,404
2021		1,980
2022		1,406
2023		—
Thereafter		—

Rent expenses for the years ended December 31, 2018, 2017 and 2016 were $2.5 million, $1.7 million, and $0.6 million, respectively.

Contingencies

From time to time, the Company may be subject to various litigation and related matters arising in the ordinary course of business. The Company does not believe it is currently subject to any material matters where there is at least a reasonable possibility that a material loss may be incurred.

On March 3, 2015, a verified class action complaint, captioned DePinto v. John S. Stafford, et al., C.A. No. 10742, was filed in the Court of Chancery of the State of Delaware against certain of the Company's current and former directors alleging cause of action for Breach of Fiduciary Duty and Invalidity of Director and Stockholder Consents and that the defendants breached their fiduciary duties in the course of approving a series of transactions. The complaint related to a financial recapitalization of the Company and certain related transactions that the Company completed in 2013.

On September 27, 2016, the parties engaged in voluntary mediation and agreed to settle the complaint’s outstanding claims for a total payment of $2.375 million to the class certified by the Delaware Court of Chancery. The settlement was reached without any party admitting wrongdoing. Under the terms of the settlement, no payment shall be made to the plaintiffs by the Company or any of the defendants in the lawsuit other than payments covered by the Company’s insurance.

On April 4, 2017, the Delaware Court of Chancery approved the settlement between the parties. On May 1, 2017, the Company’s insurance carriers fully funded the settlement account.

We recognized legal costs related to the litigation as incurred and offset any insurance proceeds when approved and issued. For the year ended December 31, 2017 no amount of loss related to the settlement has been accrued. At December 31, 2016, we reported the outstanding settlement amount of $2.355 million as a payable and reflected a receivable of the same amount for the insurance coverage. This amount was paid by the insurance carrier on our behalf in May 2017.

We are obligated to make future payments to third parties under in‑license agreements, including sublicense fees, royalties, and payments that become due and payable on the achievement of certain development and commercialization milestones. As the amount and timing of sublicense fees and the achievement and timing of these milestones are not probable and estimable, such commitments have not been included on our balance sheet. We have also entered into agreements with third party vendors which will require us to make future payments upon the delivery of goods and services in future periods.

Guarantees

In the normal course of business, we indemnify certain employees and other parties, such as collaboration partners and other parties that perform certain work on behalf of, or for the Company or take licenses to our technologies. We have agreed to hold these parties harmless against losses arising from our breach of representations or covenants, intellectual property infringement or other claims made against these parties in performance of their work with us.

These agreements typically limit the time within which the party may seek indemnification by us and the amount of the claim. It is not possible to prospectively determine the maximum potential amount of liability under these indemnification agreements since we have not had any prior indemnification claims on which to base the calculation. Further, each potential claim would be based on the unique facts and circumstances of the claim and the particular provisions of each agreement. We are not aware of any potential claims and we did not record a liability as of December 31, 2018 and 2017.