10. Leases

The Company has an operating lease for its facility and operating and finance leases for certain equipment. The Company leases office space in Cambridge, MA under an operating lease, which was last amended in January 2018, and is effective through March 2021. The Company has an option to extend the lease term for an additional five years. The Company’s exercise of this option was not considered reasonably certain as of September 30, 2019. The Company has remaining lease terms of three years to five years for certain equipment, some of which may include options to purchase at fair value.

During the first quarter of 2019, the Company entered into finance leases for certain equipment. The Company recorded assets under finance leases of $429 as property and equipment.

The components of lease expense were as follows:


	Three months ended		Nine months ended
	September 30, 2019
Operating lease cost	$	540	$	1,620

Finance lease cost:
Amortization of right-of-use assets	$	25	$	50
Interest on lease liabilities		7		14
	$	32	$	64

Supplemental balance sheet information related to leases was as follows:


	Nine months ended
	September 30, 2019
Operating leases:
Operating lease right-of-use assets	$	3,059
Operating lease liabilities, current		2,145
Operating lease liabilities		1,257

Finance leases:
Property and equipment, gross	$	429
Property and equipment, accumulated depreciation		(50)
Other liabilities, current		85
Other liabilities		299

Weighted-average remaining lease term:
Operating leases		1.6 years
Finance leases		4.0 years

Weighted-average discount rate:
Operating leases		10.3%
Finance leases		6.9%

Supplemental cash flow information related to leases was as follows:


	Nine months ended
	September 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,685
Operating cash flows from finance leases		14
Financing cash flows from finance leases		58
Right-of-use assets obtained in exchange for lease obligations:
Operating leases		4,369
Finance leases		429

Future minimum lease payments under non-cancellable leases as of September 30, 2019 were as follows:


	Operating leases		Finance leases
2019 (excluding the nine months ended September 30, 2019)	$	586	$	29
2020		2,394		116
2021		687		116
2022		—		84
2023 and thereafter		—		92
		3,667		437
Imputed interest		—		(8)
	$	3,667	$	429