Summary of Significant Accounting Policies (Details 3) (USD $) In Millions, unless otherwise specified			3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended			6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2013 Net sales Major Customers item	Mar. 31, 2012 Net sales Major Customers item	Mar. 31, 2013 Net sales Major Customers item	Mar. 31, 2012 Net sales Major Customers item	Mar. 31, 2013 Net sales Major Customers Eclipse Aerospace	Mar. 31, 2012 Net sales Major Customers Eclipse Aerospace	Mar. 31, 2013 Net sales Major Customers Eclipse Aerospace	Mar. 31, 2012 Net sales Major Customers Eclipse Aerospace	Mar. 31, 2013 Net sales Major Customers American Airlines	Mar. 31, 2012 Net sales Major Customers American Airlines	Mar. 31, 2013 Net sales Major Customers American Airlines	Mar. 31, 2012 Net sales Major Customers American Airlines	Mar. 31, 2013 Net sales Major Customers L3 Communications	Mar. 31, 2013 Net sales Major Customers FedEx	Mar. 31, 2012 Net sales Major Customers FedEx	Mar. 31, 2012 Net sales Major Customers FedEx	Mar. 31, 2012 Net sales Major Customers National Nuclear Security Administration	Mar. 31, 2012 Net sales Major Customers National Nuclear Security Administration	Mar. 31, 2013 Inventory purchases Major Suppliers item	Mar. 31, 2013 Inventory purchases Major Suppliers item
Concentrations
Number of major customers			4	3	2	3
Concentrations risk (as a percent)							24.00%	22.00%	26.00%	24.00%	19.00%	1.00%	16.00%	8.00%	14.00%	12.00%	20.00%	12.00%	16.00%	12.00%	10.00%	10.00%
Number of major suppliers																					1	1
Concentration of Credit Risk
Reserves for doubtful accounts	$ 0.2	$ 0.2