Summary of Significant Accounting Policies - Cash And Cash Equivalents (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Summary of Significant Accounting Policies
Amounts held in money market funds	$ 18.7		$ 18.7		$ 31.3
Interest income on cash equivalents	$ 0.3	$ 0.2	$ 0.6	$ 0.6