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Consolidated Statements of Cash Flows (USD $)
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Cash flows from operating activities:  
Net loss$ (3,310,243)$ (3,138,810)
Adjustments to reconcile net loss to net cash used in operating activities:  
Depreciation and amortization29,59732,706
Stock-based compensation695,827718,248
Recovery of uncollectible royalty receivable(30,000)(20,000)
Changes in assets and liabilities:  
Royalty receivables255,222110,489
Prepaid expenses and other assets40,14135,959
Deferred revenue64,84136,250
Accounts payable and accrued expenses(44,632)(99,710)
Net cash used in operating activities(2,299,247)(2,324,868)
Cash flows from investing activities:  
Purchase of fixed assets(8,726)(3,248)
Purchase of short term investments(2,000,000)0
Net cash used in investing activities(2,008,726)(3,248)
Cash flows from financing activities:  
Net proceeds from issuance of common stock04,537,574
Net proceeds from the exercise of options or warrants65,9770
Net cash provided by financing activities65,9774,537,574
Net (decrease) increase in cash and cash equivalents(4,241,996)2,209,458
Cash and cash equivalents at beginning of year6,957,5443,760,534
Cash and cash equivalents at end of period2,715,5485,969,992
Supplemental disclosure of non-cash financing activities:  
Receivable from issuance if common stock$ 0$ 406,080