12. Segments, Products and Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Total sales	$ 23,153	$ 27,096	$ 47,768		$ 55,838
Percentage of sales	100.00%	100.00%	100.00%		100.00%
Drinkable Kefir other than ProBugs[Member]
Total sales	$ 17,727	$ 20,714	$ 36,613		$ 42,378
Percentage of sales	76.00%	76.00%	77.00%		76.00%
Cheese [Member]
Total sales	$ 2,706	$ 2,853	$ 5,557		$ 5,787
Percentage of sales	12.00%	11.00%	11.00%		10.00%
Cream and other [Member]
Total sales	$ 1,145	$ 1,206	$ 2,446		$ 2,698
Percentage of sales	5.00%	4.00%	5.00%		5.00%
ProBugs Kefir [Member]
Total sales	$ 697	$ 743	$ 1,460		$ 1,695
Percentage of sales	3.00%	3.00%	3.00%		3.00%
Other Dairy [Member]
Total sales	$ 423	$ 1,118	$ 902		$ 2,455
Percentage of sales	2.00%	4.00%	2.00%		4.00%
Frozen Kefir [Member]
Total sales	$ 455	$ 461	$ 790	[1]	$ 825	[1]
Percentage of sales	2.00%	2.00%	2.00%	[1]	2.00%	[1]

[1] Includes Lifeway Kefir Shop sales