Note 16 - Segment Reporting - Sales from Natural and Organic Retail Stores (Details)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Sales percentage	100.00%	100.00%	100.00%
Grocery [Member]
Sales percentage	66.50%	66.50%	66.40%
Dietary Supplements [Member]
Sales percentage	22.20%	22.20%	22.50%
Body Care, Pet Care, and Other [Member]
Sales percentage	11.30%	11.30%	11.10%