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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Operating Activities:    
Net income (loss) $ 222,434 $ 4,665,061
Less: Net income from discontinued operations (Note 15)   83,231
Income (loss) from continuing operations 222,434 4,581,830
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations:    
Depreciation and amortization 66,945 115,361
Provision for doubtful accounts   (24,000)
Warranty provision (31,885) 109,900
Inventory obsolescence 112,189 18,861
Share-based compensation 476,779 306,987
Loss on impairment of patents 18,205 20,660
Changes in operating assets and liabilities:    
Restricted cash (39,406) (606,250)
Accounts receivable 2,994,406 1,994,632
Inventories (493,937) (918,120)
Prepaid expenses and other (72,830) (531,513)
Prepaid expenses - noncurrent 109,265 (1,265,625)
Accounts payable (447,196) (497,883)
Warranty settlements (19,199) (32,983)
Accrued liabilities (2,246,300) (167,710)
Net provided by operating activities of continuing operations 649,470 3,104,147
Net cash (used in) provided by operating activities of discontinued operations (Note 15) (3,013) 114,448
Net cash provided by operating activities 646,457 3,218,595
Investing Activities:    
Purchase of equipment (154,139) (41,645)
Patent costs paid (2,365) (761)
Net cash used in investing activities (156,504) (42,406)
Financing Activities:    
Proceeds from exercise of common stock warrants   4,346,613
Proceeds from exercise of stock options   118,356
Net cash provided by financing activities   4,464,969
Net increase in cash and cash equivalents 489,953 7,641,158
Cash and cash equivalents, beginning of period 13,870,762 5,421,167
Cash and cash equivalents, end of period 14,360,715 13,062,325
Supplemental Disclosure of Cash Flow Information    
Cash paid for interest   108
Cash paid for taxes $ 60,015 $ 222,175