Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Significant Accounting Policies [Line Items]

Schedule of ResponseDX Accounts Receivable

ResponseDX^® accounts receivable as of December 31, 2014 and March 31, 2015, consisted of the following:

 

	December 31, 2014			March 31, 2015
Net Medicare receivable	$	2,814,989		$	2,191,781
Net Private Payor receivable		6,029,300			5,639,447
		8,844,289			7,831,228
Allowance for doubtful accounts		(2,071,706	)		(2,226,890	)
Total	$	6,772,583		$	5,604,338

Schedule of Estimated Useful Lives of Property and Equipment

The Company has determined the estimated useful lives of its property and equipment, as follows:

Laboratory equipment	5 to 7 years
Furniture and equipment	3 to 7 years
Purchased and internally-developed software	3 to 5 years
Leasehold improvements	Shorter of the useful life (5 to 7 years) or the lease term

Schedule of Revenue Sources that Account for Greater than 10 Percent of Total Revenue

Revenue sources that account for greater than 10 percent of total revenue are provided below.

	Three Months Ended March 31,
	2014					2015
	Revenue		Percent of Total Revenue			Revenue		Percent of Total Revenue
Medicare, net of contractual allowances	$	1,308,422		34	%	$	1,408,241		37	%

Sales Revenue, Net [Member]

Significant Accounting Policies [Line Items]

Schedule of Revenue by Major Customers by Reporting Segments

The following details ResponseDX^® revenue for the periods indicated:

	Three Months
	Ended March 31,
	2014		2015
Net Medicare revenue	$	1,308,422	$	1,408,241
Net Private Payor revenue		2,009,131		1,920,270
Net ResponseDX® revenue	$	3,317,553	$	3,328,511

Accounts Receivable [Member]

Significant Accounting Policies [Line Items]

Schedule of Revenue by Major Customers by Reporting Segments

Customers that account for greater than 10 percent of gross accounts receivable are provided below.

	As of December 31, 2014					As of March 31, 2015
	Receivable Balance		Percent of Gross Receivables			Receivable Balance		Percent of Gross Receivables
Medicare, net of contractual allowances	$	2,814,989		29	%	$	2,191,781		26	%