Annual report pursuant to Section 13 and 15(d)

Note E - Concentrations - Customers Comprising 10% or More of Net Sales (Details)

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Note E - Concentrations - Customers Comprising 10% or More of Net Sales (Details) - Customer Concentration Risk [Member] - Sales Revenue, Net [Member]
12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Customer A [Member]      
Concentration Risk, Percentage 20.00% 21.00% 25.00%
Customer B [Member]      
Concentration Risk, Percentage 15.00% 16.00% [1] [1]
[1] Less than 10%