Summary of Significant Accounting Policies (Schedule of ResponseDX Revenue) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	$ 16,720,327	$ 19,801,359
ResponseDX [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	14,596,197	12,011,374
Private Payor [Member] | ResponseDX [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	9,709,690	7,489,642
Medicare [Member] | ResponseDX [Member]
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net ResponseDX ® revenue	$ 4,886,507	$ 4,521,732