Financial Instruments and Fair Value Measurements (Narrative) (Details) - USD ($)	9 Months Ended	12 Months Ended
	Jun. 30, 2015	Sep. 30, 2014
Financial liability on recurring basis	$ 0	$ 0
Long Term Note Receivable From Municipality Within The State Of Illinois [Member]
Interest rate used to estimate fair value	3.30%	3.20%
Long Term Note Receivable From Municipality Within The State Of Colorado [Member]
Interest rate used to estimate fair value	3.30%	3.20%
Borrowings [Member]
Interest rate used to estimate fair value	2.60%	2.40%