11.         Lease Obligations

The Company maintained a five-year operating lease agreement for its headquarters and manufacturing facility in Richmond, California (the "Richmond Lease") which expired at the end of May 2022. The Company continued to maintain its tenancy at this location until the end of August 2022, while incurring monthly expenses equal to the most recent monthly lease payment under the expired lease agreement and common area maintenance costs.

In July 2022, the Company entered into an operating lease agreement for its new headquarters and manufacturing facility in San Rafael, California (the "San Rafael Lease") expiring in October 2026 with the option to renew for an additional three-year period at the prevailing market rate at the time of extension. At the end of August 2022, the Company relocated to its new headquarters and manufacturing facility in San Rafael.

The Company has determined that the new San Rafael Lease constitutes an operating lease under ASC 842 and estimates the lease term as July 2022 through October 2026. The option to extend for a three-year period lacks significant economic incentives and disincentives, which would make exercise reasonably certain. Fixed lease payments for identified lease components over the identified term have been discounted at the Company's estimated incremental borrowing rate as of the date of contract execution and are reflected in the condensed consolidated balance sheets under the captions Lease liabilities, current and Lease liabilities, and the corresponding right of use asset is reflected in the condensed consolidated balance sheets under the caption Right-of-use assets. Non-lease components, such as common area maintenance costs, are excluded from the lease liability calculation and expensed as incurred. The Company records a straight-line monthly rent expense for the San Rafael Lease equal to the sum of all fixed lease payments divided by the number of months in the lease term.

The Company previously maintained a five-year operating lease agreement for its European operations office in Hamburg, Germany, which was originally set to expire in July 2022. In February 2022, the Company executed a new lease agreement with the same landlord for a replacement office in Hamburg, Germany commencing May 1, 2022 and expiring June 30, 2025 with an option to renew for one five-year period. Upon the early termination of the previous lease agreement, it was agreed between the landlord and the Company that access to the previously leased office space would be revoked and the Company would be relieved of its payment obligations for the final two months of the lease term. Consequently, the Company removed the right of use asset and lease liability, $15 and $16 respectively, recorded in its condensed consolidated financial statements related to the original Hamburg tenancy.

The Company has determined that the new Hamburg lease agreement constitutes a lease under ASC 842 and estimates the lease term as May 2022 through June 2025. The option to extend for a five-year period lacks significant economic incentives and disincentives which would make exercise reasonably certain. Fixed lease payments for identified lease components over the identified term have been discounted at the Company's estimated incremental borrowing rate and are reflected in the condensed consolidated balance sheets under the captions Lease liabilities, current and Lease liabilities, and the corresponding right of use asset is reflected in the condensed consolidated balance sheets under the caption Right-of-use assets. Non-lease components, such as common area maintenance costs, are excluded from the lease liability calculation and expensed as incurred. The Company records a straight-line monthly rent expense for this lease equal to the sum of all fixed lease payments divided by the number of months in the lease term.

The Company’s future lease payments as of September 30, 2023, which are presented as Lease liabilities, current and Lease liabilities on the Company’s condensed consolidated balance sheets are as follows:

Lease expense under the Company’s operating leases was $146 and $189 for the three months ended  September 30, 2023 and 2022, respectively; and $417 and $455 for the nine months ended September 30, 2023 and 2022, respectively.