Commitments and Contingencies

9 Months Ended

Sep. 30, 2020

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

11. Commitments and Contingencies

Operating Leases

The Company leases laboratory and office space in Cambridge, MA.  The Company also leases a vivarium and storage space in Cambridge, MA.  The leases expire January 31, 2021.  The lease agreements have annual scheduled payment increases and the Company is recognizing the rent expense on a straight‑line basis over the lease term. Rental expense was $0.5 million and $0.5 million for the three months ended September 30, 2020 and 2019, respectively, and $1.5 million and $1.4 million for the nine months ended September 30, 2020 and 2019, respectively.

The future minimum rental payments under the leases as of September 30, 2020 are as follows:

	Amount
Year Ending December 31,
2020	$	481
2021		160
	$	641