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Income Taxes - Operating loss carry forwards (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Net operating loss carry forwards |  |
Net operating loss carry forward | $ 6.6 | $ 7.5
Valuation allowance | 20.2 | 42.1
increase in valuation allowance | 21.9 |
Restructuring of manufacturing supply chain operations | 29.3 |
Valuation allowance on foreign tax credits | 22.1 |
Income tax expense (benefit) supply chain restructuring | 7.2 |
Foreign |  |
Net operating loss carry forwards |  |
Net operating loss carryforward, not subject to expiration | 24.6 |
Net operating loss carryforward, subject to expiration | 0.8 |
Operating loss carryforward | 24.6 |
Tax credit carryforward | 13.8 | 34.4
Austrian Operations |  |
Net operating loss carry forwards |  |
Operating loss carryforward | 24.6 |
Korean Operations |  |
Net operating loss carry forwards |  |
Operating loss carryforward | 2.6 |
U.S. |  |
Net operating loss carry forwards |  |
Capital loss carry forward | 1.7 |
Domestic |  |
Net operating loss carry forwards |  |
Net operating loss carryforward, subject to expiration | 1.8 |
Operating loss carryforward | 2.6 |
Capital loss carry forward | $ 1.7 | $ 1.0

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