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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Gross revenue	$ 4,287	$ 2,257	$ 10,810	$ 6,174
Contractual allowance and adjustments	(2,238)	(1,211)	(5,634)	(3,012)
Service revenue, net	2,049	1,046	5,176	3,162
Medicaid [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	15	10	40	25
Contractual allowance and adjustments				(3)
Service revenue, net	15	10	40	22
Medicare [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	811	373	1,979	1,234
Contractual allowance and adjustments				(17)
Service revenue, net	811	373	1,979	1,217
Self-Pay [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	196	5	335	20
Contractual allowance and adjustments			(3)
Service revenue, net	196	5	332	20
Third Party Payer [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	3,188	1,701	7,944	4,289
Contractual allowance and adjustments	(2,238)	(1,211)	(5,631)	(2,992)
Service revenue, net	950	490	2,313	1,297
Contract Diagnostic Services [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	26	142	408	569
Service revenue, net	26	142	408	569
Clinical Research Grants and Other [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	51	26	104	37
Service revenue, net	51	26	104	37
Service revenue, net [Member]
Disaggregation of Revenue [Line Items]
Gross revenue	4,236	2,231	10,706	6,137
Contractual allowance and adjustments	(2,238)	(1,211)	(5,634)	(3,012)
Service revenue, net	$ 1,998	$ 1,020	$ 5,072	$ 3,125

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
-Paragraph 5
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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