The Company leases office space in Oakwood Village, Ohio and Mountain View, California under noncancelable operating lease agreements. The Company leases and occupies approximately 19,800 square feet of office space in Oakwood Village, Ohio, which expires on October 31, 2019, with an option to extend the term through October 31, 2021.

In June 2014, the Company entered into an office lease agreement to lease approximately 25,500 square feet of office space located in Mountain View, California, which expires on November 30, 2019. In June 2018, the Company entered into an amendment to extend the term of the lease agreement through July 31, 2025.

In April 2018, the Company entered into a lease agreement to lease approximately 24,600 square feet of additional office space located in Mountain View, California. The lease commenced in December 2018, and will expire on the seventh anniversary of the commencement date, and the Company has the option to extend the term of the lease for a period of up to five years.

At December 31, 2018, the future minimum payments for the operating leases are as follows (in thousands):

Year Ended December 31,
2019	$	2,070
2020		2,353
2021		2,424
2022		2,496
2023		2,571
Thereafter		4,532
Total future minimum payments	$	16,446

Rent expense incurred under operating leases was $1.4 million, $1.3 million and $1.3 million in each of the years ended December 31, 2018, 2017 and 2016, respectively.

In the normal course of business, the Company may become involved in legal proceedings. The Company will accrue a liability for such matters when it is probable that a loss has been incurred and the amount can be reasonably estimated. When only a range of possible losses can be established, the most probable amount in the range is accrued. If no amount within this range is a better estimate than any other amount within the range, the minimum amount in the range is accrued. At December 31, 2018, and 2017, the Company was not involved in any material legal proceedings.

At December 31, 2018 and 2017, the Company had no outstanding firm purchase commitments.