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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Tables)

3 Months Ended

Mar. 31, 2021

SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE [Abstract]

Service revenue, net for the three months ended March 31, 2021 and 2020 were as follows:


	For the Three Months Ended March 31,
(dollars in thousands)	Diagnostic Testing				Biomarker Testing				Total
	2021		2020		2021		2020		2021		2020
Medicaid	$	13	$	9	$	—	$	—	$	13	$	9
Medicare		984		524		—		—		984		524
Self-pay		47		50		—		—		47		50
Third party payers		900		517		—		—		900		517
Contract diagnostics		—		—		—		358		—		358
Service revenue, net	$	1,944	$	1,100	$	—	$	358	$	1,944	$	1,458

Schedule of Gross to Net Sales Adjustments

The following table presents our revenues initially recognized for each associated payer class during the three months ended March 31, 2021 and 2020.


	For the Three Months Ended March 31,
(dollars in thousands)					Contractual Allowances and				Revenues, net of Contractual
	Gross Revenues				adjustments				Allowances and adjustments
	2021		2020		2021		2020		2021		2020
Medicaid	$	13	$	9	$	—	$	—	$	13	$	9
Medicare		984		524		—		—		984		524
Self-pay		47		50		—		—		47		50
Third party payers		3,133		1,808		(2,233)		(1,291)		900		517
Contract diagnostics		—		358		—		—		—		358
		4,177		2,749		(2,233)		(1,291)		1,944		1,458
Other		167		24		—		—		167		24
	$	4,344	$	2,773	$	(2,233)	$	(1,291)	$	2,111	$	1,482

Schedule of Reported Revenues Net of Collection Allowance

The following table presents our reported revenues net of the collection allowance and adjustments for the three months ended March 31, 2021 and 2020.


	For the Three Months Ended March 31,
	Revenues, net of
(dollars in thousands)	Contractual Allowances				Allowances for doubtful
	and adjustments				accounts				Total
	2021		2020		2021		2020		2021		2020
Medicaid	$	13	$	9	$	(8)	$	(8)	$	5	$	1
Medicare		984		524		(99)		(79)		885		445
Self-pay		47		50		—		—		47		50
Third party payers		900		517		(180)		(179)		720		338
Contract diagnostics		—		358		—		—		—		358
		1,944		1,458		(287)		(266)		1,657		1,192
Other		167		24		—		—		167		24
	$	2,111	$	1,482	$	(287)	$	(266)	$	1,824	$	1,216

Schedule of Receivables

The following summarizes the mix of receivables outstanding related to payer categories:


(dollars in thousands)	March 31, 2021		December 31, 2020
Medicaid	$	106	$	131
Medicare		1,057		1,054
Self-pay		232		276
Third party payers		3,380		3,373
Contract diagnostic services and other		151		53
	$	4,926	$	4,887
Less allowance for doubtful accounts		(4,301)		(4,013)
Accounts receivable, net	$	625	$	874

Schedule of Allowance for Doubtful Accounts

The following table presents the roll-forward of the allowance for doubtful accounts for the three months ended March 31, 2021.


			Allowance for
			Doubtful
(dollars in thousands)			Accounts
Balance, January 1, 2021			$	(4,013)
Collection Allowance:
Medicaid	$	(8)
Medicare		(99)
Third party payers		(180)
		(287)
Bad debt expense	$	(1)
Total charges				(288)
Balance, March 31, 2021			$	(4,301)

Schedule of Customer Revenue and Accounts Receivable Concentrations

Our customers are oncologists, hospitals, reference laboratories, physician-office laboratories, and pharma and biotech companies. Customers that accounted for 10% or greater of our net sales or accounts receivable for the identified periods is as follows:


	Net sales			Accounts receivable, as of
	Three Months Ended
	March 31,			March 31,		December 31,
	2021	2020		2021		2020

Customer A	*	27	%	*		*
Customer B	*	10	%	*		*
Customer C	*	*		11	%	*

* represents less than 10%