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Acquisitions - IFCM Commodities (Details) - IFCM Commodities Acquisition [Member] - USD ($)
$ in Millions
12 Months Ended
Jan. 02, 2020
Sep. 30, 2020
Business Acquisition [Line Items]    
Percentage of stock purchased 100.00%  
Purchase price $ 1.9  
Business acquisition, premium amount $ 1.0  
Operating revenues post-acquisition results of the acquired business   $ 1.8
Net income (loss) post-acquisition results of the acquired business   $ 0.5