CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,978,994	$ 716,590	$ 748,376
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	529,325	672,196	826,748
Deposit forfeiture, installation kits			118,660
Share-based compensation expense:
Stock options	444,507	170,586	171,491
Nonvested stock awards	199,998	199,712	199,946
Excess tax adjustment from share-based compensation:
Nonvested stock awards	(5,422)	6,813	(1,926)
Provision for (recovery) loss on accounts receivable	(1,373)	17,225
Loss on disposal of property and equipment		2,413	4,917
Excess and obsolete inventory cost	113,456	471,496
Deferred income taxes	(2,434,379)	751	(11,081)
(Increase) decrease in:
Accounts receivable	(853,025)	(611,363)	3,658,730
Inventories	(406,408)	676,301	650,593
Prepaid expenses and other current assets	(1,156,008)	78,066	273,711
Other non-current assets		(121,237)
Increase (decrease) in:
Accounts Payable	695,948	(100,362)	(664,113)
Accrued expenses	192,101	(188,354)	(200,500)
Income taxes payable	(110,805)	219,324	(116,058)
Deferred revenue	1,193,922	66,009	(59,027)
Net cash provided by operating activities	1,380,831	2,276,166	5,600,467
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(217,533)	(255,454)	(189,790)
Net cash (used in) investing activities	(217,533)	(255,454)	(189,790)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of treasury stock	(798,462)	(298,926)	(48,630)
Repayment of capitalized lease obligations	(13,189)	(12,278)	(11,431)
Other			36
Net cash (used in) financing activities	(811,651)	(311,204)	(60,025)
Net increase in cash and cash equivalents	351,647	1,709,508	5,350,652
Cash and cash equivalents, beginning of year	42,625,854	40,916,346	35,565,694
Cash and cash equivalents, end of year	42,977,501	42,625,854	40,916,346
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid for interest	599	1,509	2,357
Cash paid for income tax	153,327	11,500	121,473
Cash received from income tax refund	$ 4,096	$ 43,253	$ 1,000