CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income available to common shareholders	$ 16,672,257	$ 15,545,265
Adjustments to reconcile net income available to common shareholders to net cash flows from (used in) operating activities:
Depreciation	3,572,953	3,093,017
Amortization	70,887
Equity method investment earnings, net of tax	(1,670,133)	(3,357,978)
Gain on re-valuation of equity method investment to fair value	(2,387,411)
Gain on sales of property and equipment	(140,139)	(9,864)
Equity-based compensation	3,103,320	2,415,156
Deferred income taxes	797,360	(275,347)
Provision for losses on doubtful accounts	(32,420)	50,000
Inventory allowance	212,637	37,708
Change in fair value of mandatorily redeemable non-controlling interest	1,476,986
Changes in assets and liabilities net of effects of business acquisition:
Accounts receivable	3,032,876	(1,615,734)
Inventories	3,240,946	3,721,980
Prepaid and other current assets	(5,344,754)	(2,732,480)
Equity method investment distributions	1,095,467	1,392,730
Other assets	(730,391)	48,967
Accounts payable	332,400	1,998,494
Accrued expenses and accrued wages, salaries and bonuses	2,482,409	1,164,828
Other long-term liabilities	(653,419)	(169,854)
Income taxes payable and receivable	(2,241,755)	(371,248)
Net cash flows from (used in) operating activities	22,890,076	20,935,640
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(14,691,799)	(1,525,882)
Proceeds from sales of property and equipment	152,000	55,728
Principal payment received on note receivable	175,000
Cash acquired in business acquisition	7,958
Net cash flows from (used in) investing activities	(14,356,841)	(1,470,154)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facilities	2,042,679,688	1,663,751,276
Repayments under revolving credit facilities	(2,041,106,459)	(1,682,072,093)
Proceeds from borrowings on long-term debt		3,000,000
Principal payments on long-term debt	(4,909,548)	(510,177)
Proceeds from exercise of stock options	173,590
Repurchase of common stock		(5,738)
Dividends on common stock	(3,440,202)	(3,355,301)
Settlement and withholdings of equity-based awards	(1,280,749)	(415,057)
Distributions to non-controlling interest	(737,570)
Net cash flows from (used in) financing activities	(8,621,250)	(19,607,090)
Net change in cash	(88,015)	(141,604)
Cash, beginning of period	519,591	661,195
Cash, end of period	431,576	519,591
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	2,210,828	1,353,985
Cash paid during the period for income taxes	7,915,225	5,138,454
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	91,656	128,249
Effect of business acquisition (see Note 2)	23,308,624
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 2,280,783	$ 949,812