Business and Credit Concentration (Details) - item	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Net sales | One customer
Business and Credit Concentration
Number of customers	1	1	1
Net sales | Customer concentration risk | Customer A
Business and Credit Concentration
Percentage of concentration risk	11.00%	11.00%	13.00%
Net sales | Customer concentration risk | Customer A | Wholesale
Business and Credit Concentration
Percentage of concentration risk	18.00%	19.00%	21.00%
Gross accounts receivable | Customer concentration risk | Customer A | Wholesale
Business and Credit Concentration
Percentage of concentration risk	11.00%	13.00%
Gross accounts receivable | Customer concentration risk | Customer B | Wholesale
Business and Credit Concentration
Percentage of concentration risk	12.00%	11.00%