Summary Of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Property, Plant and Equipment [Line Items]
Research and development costs	$ 408,335	$ 428,693
Warranty costs	$ 7,000	$ 5,000
Minimum [Member]
Property, Plant and Equipment [Line Items]
Original maturity of investments	3 months
Period for inventory quantities to be identified as excess	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Remaining maturity of investments	1 year
Buildings And Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	20 years
Buildings And Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Machinery And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Machinery And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Office Equipment And Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Office Equipment And Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Niagara Scientific, Inc. [Member]
Property, Plant and Equipment [Line Items]
Period that sales has consisted of spare parts orders	3 years