Commitments and Contingencies - Weighted-Average Remaining Lease Term and Discount Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases
Weighted-average remaining lease term (years)	7 years 1 month 24 days	7 years 11 months 8 days
Weighted-average discount rate	4.61%	4.61%
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 456	$ 267
Leased assets obtained in exchange for new operating lease liabilities		$ 2,072