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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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