The Company entered into an operating lease agreement to lease the office space in Vancouver, Canada commencing March 1, 2018. The lease 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 and all operating costs to the Company. The Company recorded an impairment charge of $0.1 million during the year ended December 31, 2020.

The components of lease expense, which are recorded in general and administrative expense, and related cash flows for the year ended December 31, 2020 and 2019 were as follows:

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

As of December 31, 2020, the weighted average remaining lease term and discount rate for the operating lease are 2.2 years and 6.5%, respectively.

As of December 31, 2020, maturities of lease liability due under the lease agreement are as follows:

Years Ending December 31:	Operating Leases
	(in thousands)
2021		226
2022		180
Total lease payments		406
Less imputed interest		(24	)
Total	$	382

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

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 December 31, 2020. 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.