Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 416,000	$ 415,000
Deferred credit amortization period	Four year
General Electric Company
Finite Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	10,000,000
Additional amount paid on execution of agreement	7,000,000
Acquired finite-lived intangible assets, period	3 years
Deferred credit	$ 8,100,000
Supply Agreement
Finite Lived Intangible Assets [Line Items]
Useful life of intangible assets	15 years