Derivatives (Summary Of Derivative Contracts) (Details) - USD ($)		Dec. 31, 2019	Sep. 30, 2019
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross amounts recognized - Current Assets	[1]	$ 883,167	$ 2,256,639
Offsetting adjustments - Current Assets	[1]	(109,061)
Net presentation on Condensed Balance Sheets - Current Assets	[1]	774,106	2,256,639
Gross amounts recognized - Current Liabilities	[1]	(109,061)
Offsetting adjustments - Current Liabilities	[1]	109,061
Gross amounts recognized - Non-Current Assets	[1]	371	237,505
Net presentation on Condensed Balance Sheets - Non-Current Assets	[1]	$ 371	$ 237,505

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