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STATEMENTS OF CASH FLOWS (USD $)
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Net loss $ (1,306,383) $ (746,300)
Depreciation and amortization 169,633 58,666
Stock based compensation expense 199,925 194,029
Gain on sale and license of assets (69,952)  
Accounts receivable (192,013) (51,942)
Inventories (303,663) (240,394)
Prepaid expenses and other current assets 86,157 (69,674)
Accounts payable 63,345 138,169
Accrued expenses 175,753 50,998
Deferred revenue 102,395 (336,979)
Net cash used in operating activities (1,074,803) (1,003,427)
Purchase of property and equipment (213,309) (28,769)
Net cash used in investing activities (213,309) (28,769)
Proceeds from warrant exercise   270,370
Proceeds from issuance of common stock 3,387,601 1,394,086
Stock issuance costs (110,261) (37,009)
Net cash provided by financing activities 3,277,340 1,627,447
Net increase in cash and cash equivalents 1,989,228 595,251
Cash and cash equivalents at beginning of period 950,285 721,121
Cash and cash equivalents at end of period 2,939,513 1,316,372
Interest   177
Income taxes   $ 1,256