SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 1,046	$ 823	$ 3,162	$ 2,578
less allowance for doubtful accounts	(262)	(173)	(723)	(399)
Net sales	784	650	2,439	2,179
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	10	15	22	38
less allowance for doubtful accounts	(10)	(15)	(22)	(38)
Medicare [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	373	288	1,217	703
less allowance for doubtful accounts	(56)	(43)	(183)	(105)
Net sales	317	245	1,034	598
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	5	48	20	94
Net sales	5	48	20	94
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	490	289	1,297	639
less allowance for doubtful accounts	(196)	(115)	(518)	(256)
Net sales	294	174	779	383
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	142	168	569	1,024
Net sales	142	168	569	1,024
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	26	15
Net sales	26	15
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	1,020	808	3,125	2,498
less allowance for doubtful accounts	(262)	(173)	(723)	(399)
Net sales	758	635	2,402	2,099
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 26	$ 15	37	80
Net sales			$ 37	$ 80