Condensed Consolidated Unaudited Statements of Cash Flows - USD ($)	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,480,091	$ 1,046,464
Adjustments to reconcile net income from operations to net cash flows from operating activities:
Depreciation	498,505	460,183
Amortization	32,500	66,250
Gain on sale of property and equipment	(300)	(23,559)
Equity-based compensation	334,256	459,278
Deferred income taxes	(482,112)	406,972
Provision (recovery) for losses on doubtful accounts	(3,000)	183
Provision for losses on inventory obsolescence	30,660	58,776
Other	989	319
Changes in assets and liabilities:
Accounts receivable	182,299	3,605,673
Inventories	23,179,388	(1,385,731)
Prepaid and other current assets	(3,763,827)	1,969,853
Other assets	(13,155)	24,074
Accounts payable	(2,523,433)	(2,179,939)
Accrued expenses and accrued wages, salaries and bonuses	(2,011,951)	(2,370,918)
Income taxes payable	113,026	28,134
Net cash flows from operating activities	17,053,936	2,166,012
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(291,318)	(400,778)
Proceeds from sales of property and equipment	300	31,478
Net cash flows from investing activities	(291,018)	(369,300)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	305,522,554	319,265,456
Repayments under revolving credit facility	(321,921,515)	(319,998,237)
Principal payments on long-term debt	(92,411)	(89,662)
Repurchase of common stock	(15,175)	(1,038,060)
Dividends on common stock	(129,026)	(127,713)
Withholdings on the exercise of equity-based awards	(79,850)	(82,456)
Net cash flows from financing activities	(16,715,423)	(2,070,672)
Net change in cash	47,495	(273,960)
Cash, beginning of period	523,065	605,380
Cash, end of period	570,560	331,420
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	199,423	223,802
Cash paid during the period for income taxes		397,894
Supplemental disclosure of non-cash information:
Equipment acquisitions classified in accounts payable	15,465	2,128
Dividends declared, not paid	200,843	194,173
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 1,183,091	$ 1,262,763