CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 716,590	$ 748,376	$ 5,008,661
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	672,196	826,748	1,085,316
Deposit forfeiture, installation kits		118,660
Share-based compensation expense:
Stock options	170,586	171,491	490,989
Nonvested stock awards	199,712	199,946	200,121
Excess tax benefit from share-based compensation:
Nonvested stock awards	6,813	(1,926)	3,095
Provision for loss on accounts receivable	17,225		185,848
Loss on disposal of property and equipment	2,413	4,917	56,678
Excess and obsolete inventory cost	471,496		506,656
Deferred income taxes	751	(11,081)	(89,357)
(Increase) decrease in:
Accounts receivable	(611,363)	3,658,730	(2,156,111)
Inventories	676,301	650,593	3,547,616
Prepaid expenses and other current assets	78,066	273,711	178,847
Other non-current assets	(121,237)		(1,870)
Increase (decrease) in:
Accounts Payable	(100,362)	(664,113)	(1,141,991)
Accrued expenses	(188,354)	(200,500)	(1,658,551)
Income taxes payable	219,324	(116,058)	(686,352)
Deferred revenue	66,009	(59,027)	(339,350)
Other non-current liabilities			129,304
Net cash provided by operating activities	2,276,166	5,600,467	5,319,549
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(255,454)	(189,790)	(332,515)
Proceeds from the sale of property and equipment			620
Net cash (used in) investing activities	(255,454)	(189,790)	(331,895)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of Industrial Development Bond			(4,335,000)
Purchase of treasury stock	(298,926)	(48,630)	(108,250)
Repayment of capitalized lease obligations	(12,278)	(11,431)	(10,642)
Other		36
Net cash (used in) financing activities	(311,204)	(60,025)	(4,453,892)
Net increase in cash and cash equivalents	1,709,508	5,350,652	533,762
Cash and cash equivalents, beginning of year	40,916,346	35,565,694	35,031,932
Cash and cash equivalents, end of period	42,625,854	40,916,346	35,565,694
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest	1,509	2,357	48,303
Cash paid for income tax	11,500	121,473	804,486
Cash received from income tax refund	$ (43,253)	$ (1,000)	$ (25,115)