Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Commitments and Contingencies - Operating Leases Future Minimum Payments (Details) $ in Thousands	Sep. 30, 2021 USD ($)	Sep. 30, 2021 $ / €	Sep. 30, 2021 $ / £	Dec. 31, 2020 USD ($)	Dec. 31, 2020 $ / €	Dec. 31, 2020 $ / £
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021 (remainder)	$ 366
2022	1,464
2023	1,464
2024	1,468
2025	1,473
2026	1,474
Thereafter	39,480
Total minimum lease payments	47,189
Less: Effects of discounting	(23,753)
Total present value of lease payments	$ 23,436			$ 25,350
Foreign currency exchange rate (GBP, EUR, CAD per USD)		1.16	1.35		1.23	1.37