SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 4,095	$ 3,448
less allowance for doubtful accounts	(968)	(584)
Net sales	3,127	2,864
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	28	50
less allowance for doubtful accounts	(28)	(50)
Medicare [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	1,669	1,000
less allowance for doubtful accounts	(251)	(150)
Net sales	1,418	850
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	34	138
Net sales	34	138
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	1,725	960
less allowance for doubtful accounts	(689)	(384)
Net sales	1,036	576
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	595	1,187
Net sales	595	1,187
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	4,051	3,335
less allowance for doubtful accounts	(968)	(584)
Net sales	3,083	2,751
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	44	113
Net sales	$ 44	$ 113