Significant Customers (Schedule Of Percentage Of Net Sales And Net Accounts Receivables Due From Customers From Continuing Operations) (Detail)	3 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2012
Significant Customers [Line Items]
Percentage of net sales due to customers	100.00%	100.00%
Percentage of net accounts receivable due from customers	100.00%		100.00%
BMW [Member]
Significant Customers [Line Items]
Percentage of net sales due to customers	22.00%	23.00%
Percentage of net accounts receivable due from customers	19.00%		13.00%
Audi/Volkswagen [Member]
Significant Customers [Line Items]
Percentage of net sales due to customers	13.00%	14.00%
Percentage of net accounts receivable due from customers	8.00%		11.00%
Other Customers [Member]
Significant Customers [Line Items]
Percentage of net sales due to customers	65.00%	63.00%
Percentage of net accounts receivable due from customers	73.00%		76.00%