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11. Segments, Products and Customers (Tables)
12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Schedule of sales of products by category
    2018     2017  
In thousands   $     %     $     %  
                         
Drinkable Kefir other than ProBugs   $ 78,523       76%     $ 90,514       76%  
Cheese     11,486       11%       11,516       10%  
Cream and other     5,276       5%       6,527       5%  
Cupped Kefir and Skyr     3,836       4%       4,138       4%  
ProBugs Kefir     2,795       3%       4,537       4%  
Frozen Kefir (a)     1,434       1%       1,661       1%  
Net Sales   $ 103,350       100%     $ 118,893       100%