Leases - Summary (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) lease	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Leases
Number of finance leases | lease	0
Number of operating leases | lease	1
Lease liability	$ 959,000
Lease assets	949,000	$ 138,000
Operating lease expense	180,000,000	190,000,000
Operating lease expense information:
Cash paid for amounts included in measurement of lease liabilities	131,000	$ 184,000	$ 152,000
ROU assets obtained in exchange for lease liabilities	$ 969,000
Weighted-average remaining lease term (years)	3 years 3 months
Weighted-average discount rate	11.80%