Summary of Significant Accounting Policies (Schedule of Customers that Account for Greater than 10 Percent of Accounts Receivable) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Receivable Balance	7,810,417		6,225,923
GlaxoSmithKline LLC [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Percent of Total Receivables	0.00%	[1]	5.80%
GlaxoSmithKline LLC [Member] | Accounts Receivable [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Receivable Balance	174,547		597,937
Percent of Total Receivables	0.00%	[1]	6.90%
GlaxoSmithKline Biologicals S.A. [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Percent of Total Receivables	0.00%	[1]	17.90%
GlaxoSmithKline Biologicals S.A. [Member] | Accounts Receivable [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Receivable Balance	588,212		544,298
Percent of Total Receivables	0.00%	[1]	6.30%
GlaxoSmithKline Entities [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Percent of Total Receivables	0.00%	[1]	23.70%
GlaxoSmithKline Entities [Member] | Accounts Receivable [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Receivable Balance	762,759		1,142,235
Percent of Total Receivables	0.00%	[1]	13.20%
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Percent of Total Receivables	29.20%		22.80%
Medicare [Member] | Accounts Receivable [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Receivable Balance	2,814,989		2,422,611
Percent of Total Receivables	28.50%		28.10%

[1] indicates amount is below 10%