Summary of Significant Accounting Policies (Schedule of Revenue Sources that Account for Greater than 10 Percent of Total Revenue) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 19,801,359	$ 18,736,669
GlaxoSmithKline LLC[Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	1,134,366	1,280,704
Percent of Total Revenue	5.80%	6.80%
GlaxoSmithKline Biologicals S.A. [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	3,534,619	3,241,211
Percent of Total Revenue	17.90%	17.30%
GlaxoSmithKline Entities [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	4,668,985	4,521,915
Percent of Total Revenue	23.70%	24.10%
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 4,521,732	$ 5,405,393
Percent of Total Revenue	22.80%	28.80%