Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 118,000	$ 416,000
Cash received from amended supply agreement		10,000,000
Deferred credit amortization period		4 years
General Electric Company
Finite Lived Intangible Assets [Line Items]
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 asset		15 years