Leases (Tables)

12 Months Ended

Dec. 31, 2020

Leases [Abstract]

Schedule of Operating Lease Information

The following table presents key information regarding these leases (dollars in thousands):

	Mission Bay Facility		Third Street Facility
Lease commencement	September 2017		June 2018
Lease term	January 2030		January 2030
Space delivered during the year ended December 31, 2019
Square footage	13,907		67,105
Right-of-use asset and lease liability recognized	$	6,698	$	50,993
Space delivered during the year ended December 31, 2020
Square footage	4,940		—
Right-of-use asset and lease liability recognized	$	2,133	$	—
Renewal terms	Two consecutive five-year terms		One five-year term

Lease, Cost

The components of lease costs, which we include in operating expenses in our Consolidated Statements of Operations, were as follows (in thousands):

	Year Ended December 31,
	2020		2019		2018
Operating lease cost	$	18,985	$	14,697	$	7,972
Variable lease cost	8,179		6,408		4,497
Total lease costs	$	27,164	$	21,105	$	12,469

Future Minimum Lease Payments for Operating Leases

As of December 31, 2020, the maturities of our operating lease liabilities were as follows (in thousands):

Year ending December 31,
2021	$	17,938
2022	20,141
2023	20,780
2024	21,439
2025	22,117
2026 and thereafter	97,764
Total lease payments	200,179
Less: portion representing interest	(46,380)
Less: lease incentives	(3,511)
Operating lease liabilities	150,288
Less: current portion	(13,915)
Operating lease liabilities, less current portion	$	136,373