Derivatives (Summary Of Derivative Contracts) (Details) - USD ($)		Jun. 30, 2017	Sep. 30, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross amounts recognized - Current Assets	[1]	$ 1,492,208	$ 68,235
Offsetting adjustments - Current Assets	[1]	(52,522)	(68,235)
Net presentation on Condensed Balance Sheets - Current Assets	[1]	1,439,686
Gross amounts recognized - Current Liabilities	[1]	52,522	471,847
Offsetting adjustments - Current Liabilities	[1]	(52,522)	(68,235)
Net presentation on Condensed Balance Sheets - Current Liabilities	[1]		403,612
Gross amounts recognized - Non-Current Assets	[1]	11,711	4,759
Offsetting adjustments - Non-Current Assets	[1]		(4,759)
Net presentation on Condensed Balance Sheets - Non-Current Assets	[1]	$ 11,711
Gross amounts recognized - Non-Current Liabilities	[1]		29,418
Offsetting adjustments - Non-Current Liabilities	[1]		(4,759)
Net presentation on Condensed Balance Sheets - Non-Current Liabilities	[1]		$ 24,659

[1] See Fair Value Measurements section for further disclosures regarding fair value of financial instruments