SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Tables)

12 Months Ended

Dec. 31, 2020

SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE [Abstract]

Schedule of Net Revenues

Service revenue, net for the years ended December 31, 2020 and 2019 was as follows:

(dollars in thousands)	Diagnostic Testing				Biomarker Testing				Total
	2020		2019		2020		2019		2020		2019
Medicaid	$	53	$	28	$	—	$	—	$	53	$	28
Medicare		2,882		1,669		—		—		2,882		1,669
Self-pay		408		34		—		—		408		34
Third party payers		3,442		1,725		—		—		3,442		1,725
Contract diagnostics		—		—		426		595		426		595
Service revenue, net	$	6,785	$	3,456	$	426	$	595	$	7,211	$	4,051

Schedule of Gross to Net Sales Adjustments

The following table presents our revenues initially recognized for each associated payer class during the years ended December 31, 2020 and 2019.

(dollars in thousands)					Contractual Allowances and				Revenues, net of Contractual
	Gross Revenues				adjustments				Allowances and adjustments
	2020		2019		2020		2019		2020		2019
Medicaid	$	53	$	31	$	—	$	(3)	$	53	$	28
Medicare		2,882		1,686		—		(17)		2,882		1,669
Self-pay		411		34		(3)		—		408		34
Third party payers		11,891		5,785		(8,449)		(4,060)		3,442		1,725
Contract diagnostics		426		595		—		—		426		595
		15,663		8,131		(8,452)		(4,080)		7,211		4,051
Clinical research grants and other		220		44		—		—		220		44
	$	15,883	$	8,175	$	(8,452)	$	(4,080)	$	7,431	$	4,095

Schedule of Reported Revenues Net of Collection Allowance [Table Text Block]

The following table presents our reported revenues net of the collection allowance and adjustments for the years ended December 31, 2020 and 2019.

	Revenues, net of
(dollars in thousands)	Contractual Allowances				Allowances for doubtful
	and adjustments				accounts				Total
	2020		2019		2020		2019		2020		2019
Medicaid	$	53	$	28	$	(53)	$	(28)	$	—	$	—
Medicare		2,882		1,669		(387)		(251)		2,495		1,418
Self-pay		408		34		—		—		408		34
Third party payers		3,442		1,725		(899)		(689)		2,543		1,036
Contract diagnostics		426		595		—		—		426		595
		7,211		4,051		(1,339)		(968)		5,872		3,083
Clinical research grants and other		220		44		—		—		220		44
	$	7,431	$	4,095	$	(1,339)	$	(968)	$	6,092	$	3,127

Schedule of Receivables

The following summarizes the mix of receivables as of December 31, 2020 and 2019:

(dollars in thousands)	2020		2019
Medicaid	$	131	$	107
Medicare		1,054		814
Self-pay		276		88
Third party payers		3,373		2,203
Contract diagnostic services		53		36
	$	4,887	$	3,248
Less allowance for doubtful accounts		(4,013)		(2,674)
Accounts receivable, net	$	874	$	574

Schedule of Allowance for Doubtful Accounts

The following table presents the roll-forward of the allowance for doubtful accounts for the year ended December 31, 2020:

			Allowance for
			Doubtful
(dollars in thousands)			Accounts
Balance, January 1, 2020			$	(2,674)
Collection Allowance:
Medicaid	$	(53)
Medicare		(387)
Third party payers		(899)
		(1,339)
Bad debt expense	$	—
Total charges				(1,339)
Balance, December 31, 2020			$	(4,013)

Schedule of Customer Revenue and Accounts Receivable Concentrations

	Net sales			Accounts receivable, as of
	Years Ended
	December 31,			December 31,	December 31,
	2020	2019		2020	2019
Customer A	*	19	%	*	*
Customer B	*	11	%	*	17	%
Customer C	*	*		*	12	%
* represents less than 10%