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Organization (Details) - USD ($)
$ in Millions
Jul. 31, 2021
Jan. 31, 2021
Jan. 01, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Working capital $ 16.1 $ 19.0  
Cash included in working capital 2.1 4.6  
Backlog of firm orders $ 11.7 $ 14.2 $ 8.9