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Consolidated Statements of Cash Flows (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Cash flows from operating activities:    
Net loss $ (1,149,063) $ (1,589,184)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 6,075 10,321
Stock-based compensation 52,334 713,631
Change in assets and liabilities:    
Royalty receivables 6,732 (109,941)
Prepaid expenses and other current assets 43,937 113,869
Deferred revenue 31,250 166,250
Accounts payable and accrued expenses 202,533 131,254
Net cash used in operating activities (806,202) (563,800)
Cash flows from investing activities:    
Purchases of fixed assets (43,245) (11,127)
Change in short term investments (1,040)   
Net cash used in investing activities (44,285) (11,127)
Cash flows from financing activities:    
Net proceeds from exercise of options and warrants 82,288   
Net cash provided by financing activities 82,288   
Net decrease in cash and cash equivalents (768,199) (574,927)
Cash and cash equivalents at beginning of year 5,866,123 8,390,233
Cash and cash equivalents at end of year $ 5,097,924 $ 7,815,306