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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 1,199	$ 959	$ 2,116	$ 1,755
less allowance for doubtful accounts	(257)	(142)	(461)	(226)
Net sales	942	817	1,655	1,529
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	9	11	12	23
less allowance for doubtful accounts	(9)	(12)	(12)	(23)
Net sales		(1)
Medicare [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	450	281	844	415
less allowance for doubtful accounts	(68)	(42)	(127)	(62)
Net sales	382	239	717	353
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	11	20	15	46
Net sales	11	20	15	46
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	451	219	807	350
less allowance for doubtful accounts	(180)	(88)	(322)	(141)
Net sales	271	131	485	209
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	274	368	427	856
Net sales	274	368	427	856
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	4	60
Net sales	4	60
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	1,195	899	2,105	1,690
less allowance for doubtful accounts	(257)	(142)	(461)	(226)
Net sales	938	757	1,644	1,464
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	4	60	11	65
Net sales			11	65
Clinical research grants [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments		62		62
Other [Member]
Disaggregation of Revenue [Line Items]
Revenue, net of contractual allowances and adjustments	$ 4	$ (2)	$ 11	$ 3

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