Income Taxes - Operating loss carry forwards (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Net operating loss carry forwards
Net operating loss carry forward	$ 11.9	$ 5.2
Valuation allowance	10.5	19.6
Foreign Tax Credits
Net operating loss carry forwards
Valuation allowance	4.6	12.8
Foreign
Net operating loss carry forwards
Net operating loss carryforward, not subject to expiration	26.2
Operating loss carryforward	26.2
Tax credit carryforward	4.7	13.5
Foreign | Operating Losses
Net operating loss carry forwards
Valuation allowance	5.9
Austrian Operations
Net operating loss carry forwards
Operating loss carryforward	26.2
Austrian Operations | Operating Losses
Net operating loss carry forwards
Valuation allowance		5.1
United States Operations
Net operating loss carry forwards
Operating loss carryforward	25.7
Domestic
Net operating loss carry forwards
Net operating loss carryforward, subject to expiration	25.7
Operating loss carryforward	$ 25.7
Capital loss carry forward		$ 1.7