The Company has an operating lease agreement to lease the 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 components of lease expense, which are recorded in general and administrative expense, and related cash flows for the three months ended March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Operating lease cost	$	43	$	51
Short-term lease cost		7		22
		50		73
Operating cash flows used for operating leases	$	57	$	52

As of March 31, 2021, the weighted average remaining lease term and discount rate for the operating lease are 1.9 years and 6.5%, respectively.

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

Years Ending December 31:	Operating Leases
	(in thousands)
Remainder of 2021	$	171
2022		183
Total lease payments		354
Less imputed interest		(18	)
Total	$	336

These amounts have not been reduced by future base rent due under sublease of $0.4 million.

In addition to base rent, the lease requires payment of operating costs. These costs are not included in the table above or the sublease amount.

In December 2020, the Company entered into a 48-month operating lease agreement to lease office space in San Mateo, California. The lease has not commenced as of March 31, 2021. The Company’s obligation under this office lease is $0.1 million for 2021, $0.2 million for each of 2022, 2023 and 2024, and $0.1 million for 2025.