Leases - Additional Information (Details) $ in Thousands					3 Months Ended	9 Months Ended
	Sep. 01, 2020 USD ($)	Jun. 01, 2020 USD ($)	Apr. 13, 2020 USD ($)	Mar. 12, 2019 USD ($) ft²	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 15, 2019 USD ($) ft²	Jan. 30, 2018 USD ($) ft²
Land Subject to Ground Leases | ft²				1,038
Operating Lease Monthly Rental Payment		$ 10		$ 2
Boston, MA
Security Deposit					$ 100	$ 100	$ 100
Sublease term amendment						Aug. 31, 2021
Operating lease expiration month and year						2016-08
Houston, TX
Land Subject to Ground Leases | ft²								8,443
Operating Lease Area | ft²									210
Operating Leases Future Minimum Monthly Payment Due Through Year 2021			$ 12					$ 17	$ 1
Annual Base Rent			3.00%		3.00%
Lessee Operating Lease Monthly Rental Payment	$ 15