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Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Inventory [Line Items]    
Inventory $ 19,896 $ 21,447
Supplies, embryos and other production materials    
Inventory [Line Items]    
Inventory 4,729 4,729
Work in process    
Inventory [Line Items]    
Inventory 3,186 4,391
Livestock    
Inventory [Line Items]    
Inventory 10,051 10,167
Feed    
Inventory [Line Items]    
Inventory $ 1,930 $ 2,160