Condensed Consolidated Unaudited Statements of Cash Flows - USD ($)	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,730,754	$ 3,434,215
Adjustments to reconcile net income from operations to net cash flows from (used in) operating activities:
Depreciation	2,318,045	1,827,711
Amortization		41,667
Equity method investment earnings, net of income tax	(111,666)
Loss (gain) on sales of property and equipment	17,042	(15,376)
Equity-based compensation	765,704	1,035,128
Deferred income taxes	(2,862)	112,439
Provision for losses on doubtful accounts	349,000	179,000
Inventory allowance	182,218	454,357
Changes in assets and liabilities:
Accounts receivable	(9,309,422)	(3,209,941)
Inventories	20,152,080	11,468,718
Prepaid and other current assets	(373,414)	(5,698,021)
Other assets	(126,364)	19,712
Accounts payable	2,040,386	2,485,721
Accrued expenses and accrued wages, salaries and bonuses	(1,424,472)	(1,460,935)
Other long-term liabilities	125,744	2,967
Income taxes payable and receivable	794,027	157,836
Net cash flows from (used in) operating activities	18,126,800	10,835,198
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,901,134)	(3,385,977)
Proceeds from sales of property and equipment	16,600	56,200
Investment in equity method investee	(6,500,000)
Issuance of note receivable	(3,500,000)
Net cash flows from (used in) investing activities	(12,884,534)	(3,329,777)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	1,083,878,207	1,022,309,940
Repayments under revolving credit facility	(1,087,870,919)	(1,025,624,006)
Principal payments on long-term debt	(397,936)	(686,139)
Proceeds from exercise of stock options	25,750
Repurchase of common stock	(100,524)	(3,186,987)
Dividends on common stock	(487,776)	(524,866)
Settlement and withholdings of equity-based awards	(30,208)
Net cash flows from (used in) financing activities	(4,983,406)	(7,712,058)
Net change in cash	258,860	(206,637)
Cash, beginning of period	337,704	520,644
Cash, end of period	596,564	314,007
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	1,387,381	1,140,562
Cash paid during the period for income taxes	376,835	1,265,725
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	100,424	91,838
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 990,653	$ 1,005,792