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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 22, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |  |  |
Income taxes (benefit) |  | $ 4,174 | $ 1,917 | $ 4,560
Pre-tax income |  | $ (11,967) | $ 5,923 | $ 12,451
Effective tax rate |  | 34.90% | 32.40% | 36.60%
Corporate tax rates |  | (0.30%) | 0.90% | 2.40%
US federal income tax statutory rate |  | 21.00% | 21.00% | 35.00%
Foreign income tax statutory rate |  | 6.80% | 8.90% | (9.10%)
Liability for uncertain tax positions taken on a foreign tax return |  | $ 800 |  |
Cash and cash equivalents held by foreign subsidiaries |  | 24,600 |  |
Penalties and interest related to unrecognized tax benefits |  | 100 |  | $ 100
Income tax net operating loss carryforwards |  | 18,500 |  |
Total deferred tax assets |  | 3,329 |  |
Unrecognized tax benefits that would impact effective tax rate |  | $ 800 |  |
Colorado, Missouri And West Virginia [Member] | Minimum [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Corporate tax rates |  | 4.50% |  |
Colorado, Missouri And West Virginia [Member] | Maximum [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Corporate tax rates |  | 6.50% |  |
United States [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | (3.10%) |  |
Canada [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | 31.10% |  |
Foreign income tax statutory rate |  | 26.50% |  |
Canada And Poland [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Percentage of income tax expense recorded |  | 80.90% |  |
Poland [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | 23.40% |  |
Foreign income tax statutory rate |  | 19.00% |  |
United Kingdom [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | (2.40%) |  |
Foreign income tax statutory rate |  | 19.00% |  |
Mauritius [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | 1.10% |  |
Foreign income tax statutory rate |  | 3.00% |  |
Austria [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | 41.80% |  |
Foreign income tax statutory rate |  | 25.00% |  |
Hong Kong |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective tax rate |  | 0.00% |  |
Foreign income tax statutory rate |  | 16.50% |  |
Tax Act [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Tax expense for GILTI, net |  | $ 500 |  |
US federal income tax statutory rate | 21.00% |  |  |
Tax Act [Member] | Maximum [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Tax expense for GILTI, net |  |  | $ 100 |

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