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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | $ 823 | $ 327 | $ 2,578 | $ 946
Allowances for doubtful accounts | (173) | (57) | (399) | (168)
Total | 650 | 270 | 2,179 | 778
Medicaid [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 15 | 4 | 38 | 24
Allowances for doubtful accounts | (15) | (1) | (38) | (5)
Total |  | 3 |  | 19
Medicare [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 288 | 165 | 703 | 454
Allowances for doubtful accounts | (43) | (30) | (105) | (83)
Total | 245 | 135 | 598 | 371
Self-Pay [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 48 | 33 | 94 | 87
Allowances for doubtful accounts |  | (6) |  | (16)
Total | 48 | 27 | 94 | 71
Third-Party Payor [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 289 | 114 | 639 | 370
Allowances for doubtful accounts | (115) | (20) | (256) | (64)
Total | 174 | 94 | 383 | 306
Contract Diagnostic Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 168 |  | 1,024 |
Total | 168 |  | 1,024 |
Services Revenue, Net [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 808 | 316 | 2,498 | 935
Allowances for doubtful accounts | (173) | (57) | (399) | (168)
Total | 635 | 259 | 2,099 | 767
Clinical Research Grants and Other [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue, net of contractual allowances and adjustments | 15 | 11 | 80 | 11
Total | $ 15 | $ 11 | $ 80 | $ 11

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