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Basis of Presentation, Organization and Summary of Significant Accounting Policies (Concentration of Credit and Investment Risk) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accounting Policies [Abstract] |  |  |
Significant credit losses, amount | $ 0 | $ 0 | $ 0

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