SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Gross revenue	$ 2,773	$ 1,578
Contractual allowance and adjustments	(1,291)	(661)
Service revenue, net	1,482	917
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	9	3
Service revenue, net	9	3
Medicare [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	524	394
Service revenue, net	524	394
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	50	4
Service revenue, net	50	4
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	1,808	1,017
Contractual allowance and adjustments	(1,291)	(661)
Service revenue, net	517	356
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	358	153
Service revenue, net	358	153
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Service revenue, net	24	7
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	2,749	1,571
Contractual allowance and adjustments	(1,291)	(661)
Service revenue, net	1,458	910
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	24	7
Service revenue, net	$ 24	$ 7