In December 2020, the Company entered into a 48-month operating lease agreement to lease office space in San Mateo, California. The lease commenced on April 30, 2021 and expires on April 30, 2025.

The Company also has an operating lease agreement to lease office space in Vancouver, Canada that expires on February 28, 2023. In December 2020, the Company entered into an agreement to sublet the entire office premises to a third party until February 27, 2023. Pursuant to the sublease agreement, the subtenant will pay base rent of $0.2 million per annum to the Company and all operating costs related to the office space. The Company recorded an impairment charge of $0.1 million during the year ended December 31, 2020.

The components of lease expense and related cash flows for the years ended December 31, 2021, 2020 and 2019 were as follows:

	Year ended December 31,
	2021		2020		2019
	(in thousands)
Operating lease cost	$	299	$	195	$	203
Short-term lease cost		27		42		117
		326		237		320
Operating cash flows used for operating leases	$	286	$	212	$	198

As of December 31, 2021, the weighted average remaining lease term and discount rate for the operating leases are 2.9 years and 4.7%, respectively.

As of December 31, 2021, maturities of lease liability due under the lease agreement are as follows:

Years Ending December 31:	Operating Leases
	(in thousands)
2022		397
2023		223
2024		230
2025		58
Total lease payments		908
Less imputed interest		(55	)
Total	$	853

These amounts have not been reduced by future base rent due under the Vancouver sublease of $0.2 million. In addition to base rent, the Vancouver lease requires payment of operating costs. These costs are also not included in the table above or the sublease amount.