Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases
Lessee, Operating Lease, Existence of Option to Extend [true false]	true
Lessee, Operating Lease, Existence of Option to Terminate [true false]	true
Increase in right of use assets for new leases and lease extensions	$ 0.1	$ 2.5	$ 1.0
Increase in lease liabilities for new lease and lease extensions	0.1	2.5	1.0
Operating lease expense	1.9	1.9	1.9
Variable lease expense	0.8	0.8	0.7
Cash paid for amounts included in the measurement of operating lease liabilities	$ 2.0	$ 1.9	$ 1.8
Weighted-average remaining lease term	2 years	2 years
Weighted-average discount rate	10.00%	10.00%
Minimum
Leases
Remaining lease term (in years)	1 year
Maximum
Leases
Remaining lease term (in years)	2 years