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Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash and Cash Equivalents
Amounts on deposit in excess of federally insured limits			$ 6,800,000us-gaap_CashUninsuredAmount	$ 5,600,000us-gaap_CashUninsuredAmount
Basic and Diluted Loss Per Common Share
Number of options and warrants that were not included because their effect is antidilutive			2,924,419	2,860,219	2,630,002
Fair Value Measurements
Cash and cash equivalents			7,600,000	5,900,000
Short term investments			1,500,000	5,100,000
Charge/(benefit) recorded for employee options and restricted stock	616,000	2,305,000	1,010,489	2,545,060	873,888
Charge/(benefit) recorded for non-employees			$ 32,428	$ 369,844	$ 110,649
Licensee One [Member] \| Sales [Member]
Revenue Recognition/Fee Income:
Percentage of fee income			36.00%	40.00%	62.00%
Licensee Two [Member] \| Sales [Member]
Revenue Recognition/Fee Income:
Percentage of fee income			11.00%	12.00%	6.00%
Licensee Three [Member] \| Sales [Member]
Revenue Recognition/Fee Income:
Percentage of fee income			9.00%	6.00%	5.00%
Licensee Four [Member] \| Sales [Member]
Revenue Recognition/Fee Income:
Percentage of fee income			9.00%	6.00%	5.00%
Licensee Five [Member] \| Sales [Member]
Revenue Recognition/Fee Income:
Percentage of fee income			5.00%	5.00%
Licensee Six [Member] \| Sales [Member]
Revenue Recognition/Fee Income:
Percentage of fee income				5.00%