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NET SALES SERVICE REVENUE AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | $ 1,237 | $ 527 | $ 2,220 | $ 1,032
Gross revenue including other | 1,297 | 527 | 2,285 | 1,032
Contractual allowance | (338) | (211) | (530) | (413)
Service revenue, net | 899 | 316 | 1,690 | 619
Other, net | (2) |  | 3 |
Revenue, net of contractual allowances and adjustments | 959 | 316 | 1,755 | 619
Medicaid [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 26 | 41 | 41 | 65
Contractual allowance | (15) | (33) | (18) | (45)
Service revenue, net | 11 | 8 | 23 | 20
Revenue, net of contractual allowances and adjustments | 11 | 8 | 23 | 20
Medicare [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 292 | 128 | 429 | 294
Contractual allowance | (11) | 3 | (14) | (5)
Service revenue, net | 281 | 131 | 415 | 289
Revenue, net of contractual allowances and adjustments | 281 | 131 | 415 | 289
Self-Pay [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 20 | 58 | 46 | 78
Contractual allowance |  | (24) |  | (24)
Service revenue, net | 20 | 34 | 46 | 54
Revenue, net of contractual allowances and adjustments | 20 | 34 | 46 | 54
Third-Party Payor [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 531 | 300 | 848 | 595
Contractual allowance | (312) | (157) | (498) | (339)
Service revenue, net | 219 | 143 | 350 | 256
Revenue, net of contractual allowances and adjustments | 219 | $ 143 | 350 | $ 256
Contract Diagnostic Services [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Gross revenue | 368 |  | 856 |
Service revenue, net | 368 |  | 856 |
Revenue, net of contractual allowances and adjustments | 368 |  | 856 |
Clinical Research Grants and Other [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Other, gross | 60 |  | 65 |
Other, net | 60 |  | 65 |
Revenue, net of contractual allowances and adjustments | $ 60 |  | $ 65 |

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