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Consolidated Statements of Cash Flows (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:      
Net loss $ (4,134,068) $ (3,874,865) $ (4,002,761)
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation and amortization 39,857 44,315 40,077
Stock based compensation 702,837 772,604 445,913
Recovery of uncollectible royalty receivables (70,000) (23,845) (17,106)
Change in assets and liabilities:      
Royalty receivables 116,127 (129,841) (80,598)
Prepaid expenses and other current assets (5,037) 20,861 (28,724)
Accounts payable and accrued expenses (2,300) 3,716 (128,172)
Deferred revenue 0 0 25,000
Deposits and other assets 0 (14,998) 13,844
Net cash used in operating activities (3,352,584) (3,202,053) (3,732,527)
Cash flows from investing activities:      
Purchases of fixed assets (12,517) (10,313) (23,947)
Purchase of investments (2,255,056) 0 0
Proceeds from sale of investment 1,000,000 0 2,299,496
Net cash (used in) provided by investing activities (1,267,573) (10,313) 2,275,549
Cash flows from financing activities:      
Net proceeds from issuances of common stock and exercise of options and warrants 65,977 6,409,376 2,850,000
Net cash provided by financing activities 65,977 6,409,376 2,850,000
Net (decrease) increase in cash and cash equivalents (4,554,180) 3,197,010 1,393,022
Cash and cash equivalents at beginning of year 6,957,544 3,760,534 2,367,512
Cash and cash equivalents at end of year 2,403,364 6,957,544 3,760,534
Non Cash Financing and Investing Activities      
Cashless Exercise of Stock Options: $ 276,750 $ 0 $ 0