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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Schedule of Sales, Net of Collection Allowance) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | $ 4,095 | $ 3,448
less allowance for doubtful accounts | (968) | (584)
Net sales | 3,127 | 2,864
Medicaid [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 28 | 50
less allowance for doubtful accounts | (28) | (50)
Medicare [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 1,669 | 1,000
less allowance for doubtful accounts | (251) | (150)
Net sales | 1,418 | 850
Self-Pay [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 34 | 138
Net sales | 34 | 138
Third Party Payer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 1,725 | 960
less allowance for doubtful accounts | (689) | (384)
Net sales | 1,036 | 576
Contract Diagnostic Services [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 595 | 1,187
Net sales | 595 | 1,187
Service revenue, net [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 4,051 | 3,335
less allowance for doubtful accounts | (968) | (584)
Net sales | 3,083 | 2,751
Clinical Research Grants and Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue, net of contractual allowances and adjustments | 44 | 113
Net sales | $ 44 | $ 113

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