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Accounting Pronouncements
3 Months Ended
Mar. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]  
New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Accounting PronouncementsThe Registrants believe that recently adopted and recently issued accounting standards that are not yet effective do not appear to have a material impact on the Registrants' financial position, results of operations or cash flows upon adoption.