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Business Segments (Detail Textuals) - USD ($)
$ in Thousands
Sep. 30, 2018
Jun. 30, 2018
Segment Reporting Information [Line Items]    
Equity method investments $ 3,491  
Animal Health    
Segment Reporting Information [Line Items]    
Equity method investments 3,491 $ 3,432
Performance Products    
Segment Reporting Information [Line Items]    
Equity method investments $ 528 $ 437