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Intangible Assets (Details) (USD $)	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Intangible Assets
Cost	$ 350,582		$ 358,925
Accumulated amortization	(206,156)		(200,468)
Total	144,426		158,457
Amortization expense	11,626	15,012
Loss on sale or impairment of patents	$ 5,138	$ 11,197

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

+ References

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