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, 2014		Dec. 31, 2013
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 16,720,327		$ 19,801,359
GlaxoSmithKline LLC [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	174,597		1,134,366
Percent of Total Revenue	0.00%	[1]	5.80%
GlaxoSmithKline Biologicals S.A. [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	1,287,184		3,534,619
Percent of Total Revenue	0.00%	[1]	17.90%
GlaxoSmithKline Entities [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	1,461,781		4,668,985
Percent of Total Revenue	0.00%	[1]	23.70%
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 4,886,507		$ 4,521,732
Percent of Total Revenue	29.20%		22.80%

[1] indicates amount is below 10%