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v3.19.3.a.u2

Summary of Significant Accounting Policies, Depreciable Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Depreciable Assets |  |  |
Impairments | $ 0.0 | $ 0.0 | $ 0.0
Machinery and Equipment, and Office Equipment [Member] | Minimum |  |  |
Depreciable Assets |  |  |
Estimated useful life | 3 years |  |
Machinery and Equipment, and Office Equipment [Member] | Maximum |  |  |
Depreciable Assets |  |  |
Estimated useful life | 12 years |  |
Buildings [Member] | Minimum |  |  |
Depreciable Assets |  |  |
Estimated useful life | 20 years |  |
Buildings [Member] | Maximum |  |  |
Depreciable Assets |  |  |
Estimated useful life | 40 years |  |

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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