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Consolidated Statements of Cash Flows (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011
Operating Activities: |  |
Net income | $ 1,462,020 | $ 5,022,902
Less: Net income from discontinued operations (Note 16) |  | 69,454
Net income from continuing operations | 1,462,020 | 4,953,448
Adjustments to reconcile net income to net cash provided by operating activities of continuing operations: |  |
Depreciation and amortization | 93,931 | 138,191
Provision for doubtful accounts | 4,372 |
Warranty provision | (33,566) | 74,521
Inventory obsolescence | 154,109 | (16,252)
Share-based compensation | 684,451 | 422,643
Loss on impairment of patents | 41,621 | 22,551
Changes in operating assets and liabilities: |  |
Restricted cash | 606,250 | (606,250)
Accounts receivable | (424,118) | (910,149)
Inventories | (531,078) | 64,830
Prepaid expenses and other | 221,778 | (458,914)
Prepaid expenses - noncurrent | 116,734 | (1,160,485)
Accounts payable | (44,483) | 75,155
Warranty settlements | (34,382) | (47,366)
Accrued liabilities | (2,120,448) | 1,334,094
Net cash provided by operating activities of continuing operations | 197,191 | 3,886,017
Net cash (used in) provided by operating activities of discontinued operations (Note 17) | (3,013) | 131,694
Net cash provided by operating activities | 194,178 | 4,017,711
Investing Activities: |  |
Purchase of equipment | (201,804) | (57,888)
Patent costs paid | (3,631) | (2,291)
Net cash used in investing activities | (205,435) | (60,179)
Financing Activities: |  |
Proceeds from exercise of common stock warrants |  | 4,346,613
Proceeds from exercise of stock options | 0 | 145,450
Net cash provided by financing activities |  | 4,492,063
Net (decrease) increase in cash and cash equivalents | (11,257) | 8,449,595
Cash and cash equivalents, beginning of period | 13,870,762 | 5,421,167
Cash and cash equivalents, end of period | 13,859,505 | 13,870,762
Supplemental Disclosure of Cash Flow Information |  |
Cash paid for interest |  | 108
Cash (refunded) paid for taxes | $ (152,344) | $ 222,175

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