Concentrations: (Details) (USD $)					12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 AAI	Nov. 29, 2011 AAI	Sep. 30, 2012 Net sales Major Customers item	Sep. 30, 2011 Net sales Major Customers item	Sep. 30, 2010 Net sales Major Customers item	Sep. 30, 2012 Net sales Major Customers Eclipse Aerospace	Sep. 30, 2011 Net sales Major Customers Eclipse Aerospace	Sep. 30, 2012 Net sales Major Customers FedEx	Sep. 30, 2011 Net sales Major Customers FedEx	Sep. 30, 2010 Net sales Major Customers FedEx	Sep. 30, 2012 Net sales Major Customers National Nuclear Security Administration	Sep. 30, 2010 Net sales Major Customers Lockheed Martin	Sep. 30, 2012 Net sales Major Customers AAI	Sep. 30, 2011 Net sales Major Customers AAI	Sep. 30, 2010 Net sales Major Customers AAI	Sep. 30, 2012 Net sales Major Customers Government contractors and agencies	Sep. 30, 2011 Net sales Major Customers Government contractors and agencies	Sep. 30, 2010 Net sales Major Customers Government contractors and agencies	Sep. 30, 2012 Net sales Major Products Air data systems and components	Sep. 30, 2011 Net sales Major Products Air data systems and components	Sep. 30, 2010 Net sales Major Products Air data systems and components	Sep. 30, 2012 Net sales Major Products FPDS	Sep. 30, 2011 Net sales Major Products FPDS	Sep. 30, 2010 Net sales Major Products FPDS	Sep. 30, 2012 Inventory purchases Major Suppliers item	Sep. 30, 2011 Inventory purchases Major Suppliers item
Concentrations
Number of major customers					5	5	5
Number of major annual customers					3	2	2
Concentrations risk (as a percent)					63.00%	61.00%	48.00%	20.00%	20.00%	14.00%	15.00%	10.00%	13.00%	11.00%	5.00%	8.00%	8.00%	45.00%	30.00%	43.00%	13.00%	21.00%	32.00%	87.00%	79.00%	68.00%	20.00%	27.00%
Accounts receivable	$ 3,978,512	$ 3,124,114	$ 760,000	$ 760,000	$ 1,700,000	$ 1,800,000	$ 300,000
Number of major suppliers																											1	1
Concentration of Credit Risk
Reserves for doubtful accounts	$ 200,000	$ 200,000