Leases - Weighted-Average Remaining Lease Term and Discount Rate (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Leases
Weighted-average remaining lease term (years)	6 years 11 months 15 days		7 years 1 month 24 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	$ 141	$ 107
Leased assets obtained in exchange for new operating lease liabilities		$ 2,072