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Summary of Significant Accounting Policies (Narrative) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Cash and Cash Equivalents |  |  |  |  |
Amounts on deposit in excess of federally insured limits |  |  | $ 5,600,000 |  |
Basic and Diluted Loss Per Common Share |  |  |  |  |
Number of options and warrants that were not included because their effect is antidilutive |  |  | 2,860,219 | 2,630,002 | 1,973,906
Equity-Based Compensation |  |  |  |  |
Charge/(benefit) recorded for employee options and restricted stock | 1,841,000 | 424,000 | 2,545,060 | 873,888 | 719,811
Charge/(benefit) recorded for non-employees |  |  | 174,320 | 4,690 | (16,974)
Fair Value Measurements |  |  |  |  |
Cash and cash equivalents |  |  | 5,900,000 | 8,400,000 |
Short term investments |  |  | $ 5,100,000 | $ 5,100,000 |
Consultant [Member] |  |  |  |  |
Equity-Based Compensation |  |  |  |  |
Number of shares granted |  |  |  | 60,000 |
Minimum [Member] | Consultant [Member] |  |  |  |  |
Equity-Based Compensation |  |  |  |  |
Award vesting period |  |  | 24 months |  |
Maximum [Member] | Consultant [Member] |  |  |  |  |
Equity-Based Compensation |  |  |  |  |
Award vesting period |  |  | 59 months |  |
Licensee One [Member] | Sales [Member] |  |  |  |  |
Revenue Recognition/Fee Income: |  |  |  |  |
Percentage of fee income |  |  | 40.00% | 62.00% |
Licensee Two [Member] | Sales [Member] |  |  |  |  |
Revenue Recognition/Fee Income: |  |  |  |  |
Percentage of fee income |  |  | 12.00% | 6.00% |
Licensee Three [Member] | Sales [Member] |  |  |  |  |
Revenue Recognition/Fee Income: |  |  |  |  |
Percentage of fee income |  |  | 6.00% | 5.00% |
Licensee Four [Member] | Sales [Member] |  |  |  |  |
Revenue Recognition/Fee Income: |  |  |  |  |
Percentage of fee income |  |  | 6.00% | 5.00% |
Licensee Five [Member] | Sales [Member] |  |  |  |  |
Revenue Recognition/Fee Income: |  |  |  |  |
Percentage of fee income |  |  | 5.00% |  |

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