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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Gross to Net Sales Adjustments) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Gross revenue | $ 15,883 | $ 8,175
Contractual allowance and adjustments | (8,452) | (4,080)
Service revenue, net | 7,431 | 4,095
Medicaid [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 53 | 31
Contractual allowance and adjustments |  | (3)
Service revenue, net | 53 | 28
Medicare [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 2,882 | 1,686
Contractual allowance and adjustments |  | (17)
Service revenue, net | 2,882 | 1,669
Self-Pay [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 411 | 34
Contractual allowance and adjustments | (3) |
Service revenue, net | 408 | 34
Third Party Payer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 11,891 | 5,785
Contractual allowance and adjustments | (8,449) | (4,060)
Service revenue, net | 3,442 | 1,725
Contract Diagnostic Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 426 | 595
Service revenue, net | 426 | 595
Clinical Research Grants and Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 220 | 44
Service revenue, net | 220 | 44
Service revenue, net [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Gross revenue | 15,663 | 8,131
Contractual allowance and adjustments | (8,452) | (4,080)
Service revenue, net | $ 7,211 | $ 4,051

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