Summary of Significant Accounting Policies (Schedule of Revenue Sources that Account for Greater than 10 Percent of Total Revenue) (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 4,464,991		$ 4,092,277	$ 12,641,160		$ 15,030,382
GlaxoSmithKline LLC [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	165,169		76,792	165,169		579,606
Percent of Total Revenue	0.00%			0.00%			[1]
GlaxoSmithKline Biologicals S.A. [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	296,250		633,543	1,017,406		3,166,288
Percent of Total Revenue		[1]	16.00%		[1]	21.00%
GlaxoSmithKline Entities [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	461,419		710,335	1,182,575		3,745,894
Percent of Total Revenue	10.00%		17.00%		[1]	25.00%
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 857,786		$ 956,716	$ 3,378,203		$ 3,379,405
Percent of Total Revenue	19.00%		23.00%	27.00%		23.00%

[1] Represents less than 10% of revenue.