Condensed Consolidated Unaudited Statements of Cash Flows - USD ($)	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,604,040	$ 1,919,996
Adjustments to reconcile net income from operations to net cash flows from operating activities:
Depreciation	1,619,868	1,332,542
Amortization	63,750	198,750
Gain on sale of property and equipment	(5,300)	(30,854)
Equity-based compensation	957,656	1,193,005
Deferred income taxes	(672,431)	120,367
Provision for losses on doubtful accounts	23,000	42,000
Inventory allowance	(267,389)	4,852
Other	2,967	2,296
Changes in assets and liabilities:
Accounts receivable	(3,276,391)	(1,044,423)
Inventories	22,167,954	(701,279)
Prepaid and other current assets	(5,843,877)	771,870
Other assets	(4,928)	(38,358)
Accounts payable	1,584,358	322,325
Accrued expenses and accrued wages, salaries and bonuses	125,758	(659,813)
Income taxes payable	11,751	7,059
Net cash flows from operating activities	19,090,786	3,440,335
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,120,358)	(1,761,431)
Proceeds from sales of property and equipment	5,300	42,655
Net cash flows from investing activities	(2,115,058)	(1,718,776)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	1,043,415,401	950,104,143
Repayments under revolving credit facility	(1,051,967,147)	(950,313,271)
Principal payments on long-term debt	(279,339)	(271,031)
Repurchase of common stock	(7,704,392)	(1,038,060)
Dividends on common stock	(586,796)	(579,848)
Withholdings on the exercise of equity-based awards	(101,200)	(107,082)
Net cash flows from financing activities	(17,223,473)	(2,205,149)
Net change in cash	(247,745)	(483,590)
Cash, beginning of period	523,065	605,380
Cash, end of period	275,320	121,790
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	764,557	545,719
Cash paid during the period for income taxes	1,036,680	1,620,574
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	8,203	9,881
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 1,183,091	$ 1,262,763