Derivatives (Summary Of Derivative Contracts) (Details) - USD ($)		Jun. 30, 2019	Sep. 30, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross amounts recognized - Current Assets	[1]	$ 2,552,237	$ 42,150
Offsetting adjustments - Current Assets	[1]	(62,864)	(42,150)
Net presentation on Condensed Balance Sheets - Current Assets	[1]	2,489,373
Gross amounts recognized - Non-Current Assets	[1]	222,136
Net presentation on Condensed Balance Sheets - Non-Current Assets	[1]	222,136
Gross amounts recognized - Current Liabilities	[1]	62,864	3,106,196
Offsetting adjustments - Current Liabilities	[1]	$ (62,864)	(42,150)
Net presentation on Condensed Balance Sheets - Current Liabilities	[1]		3,064,046
Gross amounts recognized - Non-Current Liabilities	[1]		349,970
Net presentation on Condensed Balance Sheets - Non-Current Liabilities	[1]		$ 349,970

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