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v3.20.4

Summary of Significant Accounting Policies Concentration of Credit Risk (Details) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Accounting Policies [Abstract] |  |  |
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Entity's Country of Domicile, Percent | 98.00% | 10.00% | 40.00%
Disclosure On Geographic Areas Revenue From External Customers Attributed to Germany |  | 89.00% | 53.00%

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- Definition Revenues from external customers attributed to the entity's country of domicile as a percentage of total revenue. + References No definition available. + Details
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- Definition Disclosure On Geographic Areas Revenue From External Customers Attributed to Germany + References No definition available. + Details
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- References No definition available. + Details
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