Summary of Significant Accounting Policies (Schedule of Revenue Sources that Account for Greater than 10 Percent of Total Revenue) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 5,313,914	$ 3,835,006	$ 10,938,105	$ 7,816,651
GlaxoSmithKline and GlaxoSmithKline Biologicals [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	1,679,175	235,917	3,035,559	955,004
Percent of Total Revenue	32.00%	6.00%	28.00%	12.00%
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 1,078,473	$ 1,306,989	$ 2,422,688	$ 2,767,307
Percent of Total Revenue	20.00%	34.00%	22.00%	35.00%