SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (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]
Gross revenue	$ 3,750	$ 2,339	$ 6,524	$ 3,917
Contractual allowance and adjustments	(2,105)	(1,140)	(3,397)	(1,801)
Service revenue, net	1,645	1,199	3,127	2,116
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	16	12	25	15
Contractual allowance and adjustments		(3)		(3)
Service revenue, net	16	9	25	12
Medicare [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	643	467	1,168	861
Contractual allowance and adjustments		(17)		(17)
Service revenue, net	643	450	1,168	844
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	89	11	139	15
Contractual allowance and adjustments	(3)		(3)
Service revenue, net	86	11	136	15
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	2,949	1,571	4,757	2,588
Contractual allowance and adjustments	(2,102)	(1,120)	(3,394)	(1,781)
Service revenue, net	847	451	1,363	807
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	24	274	382	427
Service revenue, net	24	274	382	427
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	29	4	53	11
Service revenue, net	29	4	53	11
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	3,721	2,335	6,471	3,906
Contractual allowance and adjustments	(2,105)	(1,140)	(3,397)	(1,801)
Service revenue, net	$ 1,616	$ 1,195	$ 3,074	$ 2,105