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11. Segments, Products and Customers (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Total sales $ 28,742 $ 32,117
Percentage of sales 100.00% 100.00%
Drinkable Kefir other than ProBugs[Member]    
Total sales $ 21,663 $ 25,051
Percentage of sales 76.00% 78.00%
Cheese [Member]    
Total sales $ 2,934 $ 2,834
Percentage of sales 10.00% 9.00%
Cream and other [Member]    
Total sales $ 1,492 $ 1,724
Percentage of sales [1] 5.00% 5.00%
ProBugs Kefer [Member]    
Total sales $ 952 $ 1,479
Percentage of sales 3.00% 5.00%
Other dairy [Member]    
Total sales $ 1,337 $ 593
Percentage of sales 5.00% 2.00%
Frozen Kefir [Member]    
Total sales $ 364 $ 436
Percentage of sales [2] 1.00% 1.00%
[1] Includes cream byproducts and other non-dairy products for resale
[2] Includes Lifeway Kefir Shop sales