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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, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | $ 1,252 | $ 495 | $ 3,472 | $ 1,527
Gross revenue including other | 1,267 | 506 | 3,552 | 1,538
Contractual allowance | (444) | (179) | (974) | (592)
Service revenue, net | 808 | 316 | 2,498 | 935
Other, net | 2 | 2 | 5 | 2
Revenue, net of contractual allowances and adjustments | 823 | 327 | 2,578 | 946
Medicaid [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 30 | 7 | 71 | 72
Contractual allowance | (15) | (3) | (33) | (48)
Service revenue, net | 15 | 4 | 38 | 24
Revenue, net of contractual allowances and adjustments | 15 | 4 | 38 | 24
Medicare [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 293 | 128 | 722 | 422
Contractual allowance | (5) | 37 | (19) | 32
Service revenue, net | 288 | 165 | 703 | 454
Revenue, net of contractual allowances and adjustments | 288 | 165 | 703 | 454
Self-Pay [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 48 | 37 | 94 | 115
Contractual allowance |  | (4) |  | (28)
Service revenue, net | 48 | 33 | 94 | 87
Revenue, net of contractual allowances and adjustments | 48 | 33 | 94 | 87
Third-Party Payor [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 713 | 323 | 1,561 | 918
Contractual allowance | (424) | (209) | (922) | (548)
Service revenue, net | 289 | 114 | 639 | 370
Revenue, net of contractual allowances and adjustments | 289 | 114 | 639 | 370
Contract Diagnostic Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 168 |  | 1,024 |
Service revenue, net | 168 |  | 1,024 |
Revenue, net of contractual allowances and adjustments | 168 |  | 1,024 |
Clinical Research Grants and Other [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other, gross | 15 | 11 | 80 | 11
Other, net | 15 | 11 | 80 | 11
Revenue, net of contractual allowances and adjustments | $ 15 | $ 11 | $ 80 | $ 11

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