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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Operating Activities:    
Net (loss) income $ (1,668,164) $ 222,434
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and amortization 106,485 66,945
Provision for doubtful accounts (400)  
Warranty provision (834) (31,885)
Inventory obsolescence (219,419) 112,189
Share-based compensation 582,058 476,779
Loss on sale or impairment of patents 5,138 18,205
Changes in operating assets and liabilities:    
Accounts receivable 4,351,696 2,994,406
Inventories (1,913,407) (487,687)
Prepaid expenses and other (24,674) (72,830)
Prepaid expenses and other - noncurrent 140,625 69,859
Accounts payable (86,671) (447,196)
Warranty settlements (11,585) (19,199)
Accrued and other liabilities (30,927) (2,255,563)
Net cash provided by operating activities 1,229,921 646,457
Investing Activities:    
Purchase of equipment (134,349) (154,139)
Patent costs paid (2,734) (2,365)
Net cash used in investing activities (137,083) (156,504)
Financing Activities:    
Proceeds from exercise of stock options 105,228  
Net cash provided by financing activities 105,228  
Net increase in cash and cash equivalents 1,198,066 489,953
Cash and cash equivalents, beginning of period 13,859,505 13,870,762
Cash and cash equivalents, end of period 15,057,571 14,360,715
Supplemental Disclosure of Cash Flow Information    
Cash (refunded) paid for taxes $ (38,724) $ 60,015