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, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes at statutory rate	$ 5,168,366	$ (1,429,291)	$ (6,765,705)
Change in valuation allowance	(1,313,271)	1,228,899	96,000
Percentage depletion	(602,490)	(412,650)	(258,300)
State income taxes, net of federal provision (benefit)	863,042	(176,960)	(939,310)
Effect of NOL Carryback Rate			(610,803)
Restricted stock tax benefit	59,000	76,000	58,000
Deferred directors’ compensation benefit	64,000	54,000	79,000
Law change	(56,094)	47,000
Other	19,447	(38,049)	52,118
Provision (benefit) for income taxes	$ 4,202,000	$ (651,051)	$ (8,289,000)