Income Taxes (Summary of Difference Between Provision (Benefit) for Income Taxes and Amount which Would Result from Application of Federal Statutory Rate) (Details) - USD ($)		12 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes at statutory rate		$ (6,765,705)	$ (11,387,447)	$ 465,253
Percentage depletion		(258,300)	(431,340)	(577,780)
State income taxes, net of federal provision (benefit)		(939,310)	(1,986,850)	36,980
Effect of NOL Carryback Rate		(610,803)
State NOL Valuation Allowance		96,000
Restricted stock tax benefit		58,000	185,000	(69,000)
Deferred directors’ compensation benefit		79,000	(38,000)	(134,000)
Law change	[1]			(12,464,000)
Other		52,118	177,637	3,547
Provision (benefit) for income taxes		$ (8,289,000)	$ (13,481,000)	$ (12,739,000)

[1] This is the tax effect of the Tax Cuts and Jobs Act (enacted in December 2017) on our deferred tax liabilities. This Act reduced the U.S. federal corporate tax rate from 35% to 21%.