Leases

3 Months Ended

Mar. 31, 2019

We have two noncancellable operating leases consisting of administrative and research and development office space for our Emeryville, California headquarters and former headquarters in San Diego, California that expire in May 2027 and March 2020, respectively. Our Emeryville lease includes a renewal option for an additional five years, which were not included in our determination of the lease term under the legacy lease standard as renewal was not reasonably assured at the inception of the lease. As a result, we have not considered the optional period in determining our ROU assets and lease liabilities. Our former headquarters has been subleased to an unrelated third party for the remainder of our original lease term. As of March 31, 2019, we do not have any material finance leases or service contracts with lease arrangements. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants.

The components of lease costs, which were included in our condensed consolidated statements of operations, were as follows (in thousands):


	Three Months Ended March 31, 2019
Lease costs
Operating lease cost	$	499
Short-term lease cost⁽¹⁾	328
Sublease income	(145)
Total	$	682

⁽¹⁾Short-term lease cost included $0.2 million related to a short-term lease that expired in March 2019.

Supplemental information related to operating leases
Cash paid for amounts included in the measurement of lease liabilities for operating leases	$	252
Weighted-average remaining lease term	7.6 years
Weighted-average incremental borrowing rate	6.0		%

Maturities of operating lease liabilities as of March 31, 2019 and lease commitments under noncancellable operating leases as of December 31, 2018 were as follows (in thousands):


	March 31, 2019		December 31, 2018
2019 (remaining 9 months and 12 months, respectively)	$	1,525	$	1,777
2020	1,788		1,788
2021	1,839		1,839
2022	1,894		1,894
2023	1,951		1,951
Thereafter	7,111		7,296
Total lease payments	16,108		$	16,545
Less imputed interest	(3,341)
Total operating lease liabilities	$	12,767


	As of March 31, 2019
Current portion of operating lease liabilities	$	1,412
Operating lease liabilities, net of current portion	11,355
Total lease liabilities	$	12,767