Commitments and Contingencies

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

6. Commitments and Contingencies

Facility Lease

We have a non-cancelable facility lease that is subject to base lease payments, which escalate over the term of the lease, additional charges for common area maintenance and other costs. In July 2018, we entered into a lease amendment that reduced the space we lease from 24,494 square feet to 20,508 square feet and extended the lease term to May 2023. With the lease amendment, we do not have an option to extend the lease.

Operating lease expense for each of the years ended December 31, 2021, 2020 and 2019 was $1.0 million. As of December 31, 2021 and 2020, the weighted average remaining lease term was 1.4 years and 2.4 years, respectively, and the weighted average discount rate for each year was 9.6%.

Future minimum payments under the non-cancelable facility lease and reconciliation to the operating lease liability as of December 31, 2021 were as follows (in thousands):

	Operating Lease
2022	$	1,062
2023		404
Less: Amount representing interest		(88	)
Present value of lease payments		1,378
Less: Current portion of operating lease liability		(980	)
Long-term operating lease liability, net of current portion	$	398