Condensed Consolidated Unaudited Statements of Cash Flows - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 3,077,610	$ 451,870
Adjustments to reconcile net income from operations to net cash flows from (used in) operating activities:
Depreciation	774,285	725,461
Equity method investment earnings, net of tax	(335,339)
Loss (gain) on sales of property and equipment	(2,000)
Equity-based compensation	346,891	129,931
Deferred income taxes	132,736	154,792
Provision (recovery) for losses on doubtful accounts	(24,000)	371,000
Inventory allowance	172,137	51,587
Other		(42,011)
Changes in assets and liabilities:
Accounts receivable	4,589,579	(7,171,661)
Inventories	30,967,449	39,333,140
Prepaid and other current assets	(5,792,622)	(1,578,437)
Other assets	40,193	42,052
Accounts payable	(5,069,889)	(1,623,841)
Accrued expenses and accrued wages, salaries and bonuses	(1,793,704)	(2,509,401)
Other long-term liabilities	(169,854)
Income taxes payable and receivable	(211,854)	95,772
Net cash flows from (used in) operating activities	26,701,618	28,430,254
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(432,505)	(1,228,462)
Proceeds from sales of property and equipment	2,000
Net cash flows from (used in) investing activities	(430,505)	(1,228,462)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	385,943,710	330,596,076
Repayments under revolving credit facility	(414,863,443)	(357,448,761)
Proceeds from borrowings on long-term debt	3,000,000
Principal payments on long-term debt	(136,119)	(131,580)
Repurchase of common stock	(5,738)	(8,156)
Dividends on common stock	(105,599)	(107,084)
Settlement and withholdings of equity-based awards	(250,021)
Net cash flows from (used in) financing activities	(26,417,210)	(27,099,505)
Net change in cash	(146,097)	102,287
Cash, beginning of period	661,195	337,704
Cash, end of period	515,098	439,991
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	426,655	519,459
Cash paid (refunded) during the period for income taxes	1,090,119	(1,563)
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	16,007	234,816
Dividends declared, not paid	2,932,945	166,546
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 949,812	$ 990,653