Leases - Additional Information (Details) $ in Thousands			3 Months Ended	6 Months Ended
	Jun. 01, 2020 USD ($)	Mar. 12, 2019 USD ($) ft²	Sep. 30, 2020	Jun. 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
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 | $						$ 17	$ 1
Annual Base Rent			3.00%