Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Sales From Natural and Organic Retail Stores (Details)	6 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Sales percentage	100.00%	100.00%	100.00%	100.00%
Grocery [Member]
Sales percentage	72.00%	69.00%	69.00%	68.00%
Dietary Supplements [Member]
Sales percentage	18.00%	21.00%	21.00%	21.00%
Other [Member]
Sales percentage	10.00%	10.00%	10.00%	11.00%