The Company leases office space in Irvine, California that houses its headquarters and manufacturing facility under a non-cancellable operating lease. The lease term commenced on October 1, 2018 and expires in September 2023. The Company has the option to renew the lease for two additional periods of five years each. The Company also leases office space in Solana Beach, California that houses certain management and research and development personnel. The lease term commenced on December 15, 2020, is set to expire on December 31, 2026, and is renewable for an additional five-year period, at the Company’s option, provided that the Company’s landlord has entered into an extension of its lease for the office space that encompasses the Company’s office space for at least five years. Both office leases are classified as operating leases in conformity with the provisions of Topic 842.

The lease cost, included in general and administrative expense, was $0.2 million and $0.1 million for the years ended December 31, 2020 and 2019, respectively.

The assumptions used in determining the Solana Beach lease component of the operating lease right of use asset and operating lease liability included in the accompanying December 31, 2020 consolidated balance sheet are as follows:

As of December 31, 2020, future minimum lease payments are as follows: