CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,949,576	$ 5,980,673
Adjustments to reconcile net income from operations to net cash flows from operating activities:
Depreciation	1,784,475	1,831,000
Amortization	265,000	331,667
Gain on sale of property and equipment	(31,622)	(58,926)
Equity-based compensation	1,394,879	1,403,584
Deferred income taxes	(243,387)	437,278
Provision (recovery) for losses on doubtful accounts	98,000	(199,000)
Recoveries for losses on inventory obsolescence	(101,716)	(57,247)
Other	3,285	(4,045)
Changes in assets and liabilities:
Accounts receivable	(755,299)	2,032,683
Inventories	(24,403,398)	12,445,843
Prepaid and other current assets	4,389,238	(6,482,141)
Other assets	(22,406)	29,102
Accounts payable	(467,348)	976,142
Accrued expenses and accrued wages, salaries and bonuses	669,873	(228,552)
Income taxes payable	709,028
Income taxes (receivable)		(51,721)
Net cash flows from operating activities	(13,761,822)	18,386,340
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,565,699)	(1,594,848)
Proceeds from sales of property and equipment	46,654	112,157
Net cash flows from investing activities	(2,519,045)	(1,482,691)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facility	1,311,967,154	1,303,722,318
Repayments under revolving credit facility	(1,293,467,198)	(1,314,087,299)
Principal payments on long-term debt	(362,495)	(351,383)
Repurchase of common stock	(1,124,921)	(4,795,412)
Dividends paid on convertible preferred stock		(160,360)
Dividends on common stock	(706,906)	(654,678)
Withholdings on the exercise of equity-based awards	(107,082)	(190,991)
Net cash flows from financing activities	16,198,552	(16,517,805)
Net change in cash	(82,315)	385,844
Cash, beginning of period	605,380	219,536
Cash, end of period	523,065	605,380
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	819,969	737,252
Cash paid during the period for income taxes	2,023,359	3,889,443
Supplemental disclosure of non-cash information:
Equipment acquisitions classified as accounts payable	101,361	167,444
Issuance of common stock in connection with the vesting and exercise of equity-based awards	$ 1,262,763	1,174,981
Issuance of common stock in connection with the redemption of Series A & B convertible preferred stock		$ 2,899,892