Condensed Consolidated Unaudited Statements of Cash Flows - USD ($)	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,506,518	$ 1,151,188
Adjustments to reconcile net income from operations to net cash flows from (used in) operating activities:
Depreciation	1,554,210	1,516,361
Equity method investment earnings, net of tax	(648,831)
(Gain) loss on sales of property and equipment	(1,374)	33,642
Equity-based compensation	833,624	446,114
Deferred income taxes	48,248	102,163
Provision for losses on doubtful accounts	5,000	390,000
Inventory allowance	110,769	55,746
Other		(42,011)
Changes in assets and liabilities:
Accounts receivable	1,390,027	(3,535,875)
Inventories	17,772,604	17,375,263
Prepaid and other current assets	(4,096,452)	(100,883)
Other assets	23,327	(133,074)
Accounts payable	429,389	4,401,077
Accrued expenses and accrued wages, salaries and bonuses	(610,589)	(1,432,939)
Other long-term liabilities	(169,854)
Income taxes payable and receivable	(867,112)	178,013
Net cash flows from (used in) operating activities	21,279,504	20,404,785
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(720,567)	(2,245,139)
Proceeds from sales of property and equipment	10,938
Net cash flows from (used in) investing activities	(709,629)	(2,245,139)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	771,182,879	680,161,101
Repayments under revolving credit facility	(791,045,384)	(697,319,735)
Proceeds from borrowings on long-term debt	3,000,000
Principal payments on long-term debt	(237,566)	(264,275)
Repurchase of common stock	(5,738)	(31,799)
Dividends on common stock	(3,144,130)	(380,685)
Settlement and withholdings of equity-based awards	(365,022)
Net cash flows from (used in) financing activities	(20,614,961)	(17,835,393)
Net change in cash	(45,086)	324,253
Cash, beginning of period	661,195	337,704
Cash, end of period	616,109	661,957
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	690,134	927,322
Cash paid during the period for income taxes	2,658,865	301,824
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	16,230	6,583
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 949,812	$ 990,653