SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Net Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 1,645	$ 1,199	$ 3,127	$ 2,116
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	1,616	1,195	3,074	2,105
Diagnostic Testing [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	1,592	921	2,692	1,678
Biomarker Testing and Clinical Project Services [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	24	274	382	427
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	16	9	25	12
Medicaid [Member] | Diagnostic Testing [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	16	9	25	12
Medicare [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	643	450	1,168	844
Medicare [Member] | Diagnostic Testing [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	643	450	1,168	844
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	86	11	136	15
Self-Pay [Member] | Diagnostic Testing [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	86	11	136	15
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	847	451	1,363	807
Third Party Payer [Member] | Diagnostic Testing [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	847	451	1,363	807
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	24	274	382	427
Contract Diagnostic Services [Member] | Biomarker Testing and Clinical Project Services [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	24	274	382	427
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 29	$ 4	$ 53	$ 11