Financial Instruments and Fair Value Measurements (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
	Mar. 31, 2014	Sep. 30, 2013
Financial liability on recurring basis	$ 0	$ 0
Long Term Note Receivable From Municipality Within The State Of Illinois [Member]
Note receivable from municipality, interest rate used to estimate fair value	3.50%	4.30%
Long Term Note Receivable From Municipality Within The State Of Colorado [Member]
Note receivable from municipality, interest rate used to estimate fair value	3.50%	4.30%
Borrowings [Member]
Interest rate used to estimate fair value	2.60%	2.00%