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Note 5 - Discontinued Operations (Details Textual) - Discontinued Operations [Member]
$ in Millions
3 Months Ended
Apr. 16, 2020
USD ($)
Mar. 31, 2019
USD ($)
Sep. 30, 2018
Master-Bilt and NorLake Segments [Member] | Ten Oaks Group [Member] | Subsequent Event [Member]      
Disposal Group, Including Discontinued Operation, Cash Purchase Price $ 10.6    
Cooking Solutions Group [Member]      
Number of Operating Segments     3
Cooking Solutions Group [Member] | Middleby Corporation [Member]      
Disposal Group, Including Discontinued Operation, Cash Purchase Price   $ 105.0  
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Total   20.5  
Discontinued Operation, Disposal of Discontinued Operation, Transaction Expense   4.4  
Disposal Group, Including Discontinued Operation, Consideration   $ 106.9