Income Taxes - Operating loss carry forwards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2022	Dec. 31, 2023
Net operating loss carry forwards
Net operating loss carry forward	$ 5.2		$ 6.7
Valuation allowance	19.6		23.8
Restructuring of manufacturing supply chain operations		$ (16.1)
Restructuring of manufacturing supply chain operations, Deferred tax asset recognized	$ 16.1
Amortization period	10 years
Foreign Tax Credits
Net operating loss carry forwards
Valuation allowance	$ 12.8		16.8
Foreign
Net operating loss carry forwards
Net operating loss carryforward, not subject to expiration	22.6
Net operating loss carryforward, subject to expiration	0.6
Operating loss carryforward	22.6
Tax credit carryforward	13.5		17.4
Foreign | Operating Losses
Net operating loss carry forwards
Valuation allowance	5.1		5.4
Austrian Operations
Net operating loss carry forwards
Operating loss carryforward	22.6
United States Operations
Net operating loss carry forwards
Operating loss carryforward	0.6
U.S.
Net operating loss carry forwards
Capital loss carry forward	1.6
Domestic
Net operating loss carry forwards
Operating loss carryforward	0.6
Capital loss carry forward	$ 1.6		$ 1.6