Summary of Significant Accounting Policies (Schedule of Revenue Sources that Account for Greater than 10 Percent of Total Revenue) (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 5,624,191	$ 3,981,644
Abbott Molecular, Inc. [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	910,182	32,466
Percent of Total Revenue	15.00%	1.00%
GlaxoSmithKline and GlaxoSmithKline Biologicals [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	1,356,384	719,087
Percent of Total Revenue	23.00%	18.00%
Medicare [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Revenue	$ 1,376,900	$ 1,460,318
Percent of Total Revenue	23.00%	37.00%