Condensed Consolidated Unaudited Statements of Cash Flows - USD ($)	6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,151,188	$ 2,768,536
Adjustments to reconcile net income from operations to net cash flows from (used in) operating activities:
Depreciation	1,516,361	1,217,986
Amortization		31,250
Loss (Gain) on sales of property and equipment	33,642	(17,832)
Equity-based compensation	446,114	622,390
Deferred income taxes	102,163	226,918
Provision for losses on doubtful accounts	390,000	59,000
Inventory allowance	55,746	240,699
Other	(42,011)	1,978
Changes in assets and liabilities:
Accounts receivable	(3,535,875)	3,353,602
Inventories	17,375,263	20,978,357
Prepaid and other current assets	(100,883)	(2,402,722)
Other assets	(133,074)	7,897
Accounts payable	4,401,077	(467,687)
Accrued expenses and accrued wages, salaries and bonuses	(1,432,939)	(2,275,795)
Income taxes receivable	178,013	273,742
Net cash flows from (used in) operating activities	20,404,785	24,618,319
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,245,139)	(2,159,232)
Proceeds from sales of property and equipment		23,700
Net cash flows from (used in) investing activities	(2,245,139)	(2,135,532)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	680,161,101	642,850,736
Repayments under revolving credit facility	(697,319,735)	(661,055,136)
Principal payments on long-term debt	(264,275)	(556,969)
Repurchase of common stock	(31,799)	(3,186,846)
Dividends on common stock	(380,685)	(413,100)
Net cash flows from (used in) financing activities	(17,835,393)	(22,361,315)
Net change in cash	324,253	121,472
Cash, beginning of period	337,704	520,644
Cash, end of period	661,957	642,116
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	927,322	774,784
Cash paid during the period for income taxes	301,824	674,340
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	6,583	212,800
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 990,653	$ 1,005,792