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Note 6 - Goodwill (Details Textual)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Number of Operating Segments   7  
Number of Reportable Segments   5  
Goodwill, Impairment Loss   $ 0 $ 0
Refrigerated Solutions Group [Member]      
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down $ 7,700