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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Tables) | 3 Months Ended
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Mar. 31, 2020
SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE [Abstract] |
Schedule of Net Revenues |
|  | For the Three Months Ended March 31,
(dollars in thousands) |  | Diagnostic Testing |  | Biomarker Testing |  | Total
|  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Medicaid |  | $ | 9 |  | $ | 3 |  | $ | — |  | $ | — |  | $ | 9 |  | $ | 3
Medicare |  |  | 524 |  |  | 394 |  |  | — |  |  | — |  |  | 524 |  |  | 394
Self-pay |  |  | 50 |  |  | 4 |  |  | — |  |  | — |  |  | 50 |  |  | 4
Third party payers |  |  | 517 |  |  | 356 |  |  | — |  |  | — |  |  | 517 |  |  | 356
Contract diagnostics |  |  | — |  |  | — |  |  | 358 |  |  | 153 |  |  | 358 |  |  | 153
Service revenue, net |  | $ | 1,100 |  | $ | 757 |  | $ | 358 |  | $ | 153 |  | $ | 1,458 |  | $ | 910
Schedule of Gross to Net Sales Adjustments | The following table presents our revenues initially recognized for each associated payer class during the three months ended March 31, 2020 and 2019.
|  | For the Three Months Ended March 31,
(dollars in thousands) |  |  |  | Contractual Allowances and |  | Revenues, net of Contractual
|  | Gross Revenues |  | adjustments |  | Allowances and adjustments
|  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Medicaid |  | $ | 9 |  | $ | 3 |  | $ | — |  | $ | — |  | $ | 9 |  | $ | 3
Medicare |  |  | 524 |  |  | 394 |  |  | — |  |  | — |  |  | 524 |  |  | 394
Self-pay |  |  | 50 |  |  | 4 |  |  | — |  |  | — |  |  | 50 |  |  | 4
Third party payers |  |  | 1,808 |  |  | 1,017 |  |  | (1,291) |  |  | (661) |  |  | 517 |  |  | 356
Contract diagnostics |  |  | 358 |  |  | 153 |  |  | — |  |  | — |  |  | 358 |  |  | 153
|  |  | 2,749 |  |  | 1,571 |  |  | (1,291) |  |  | (661) |  |  | 1,458 |  |  | 910
Clinical research grants and other |  |  | 24 |  |  | 7 |  |  | — |  |  | — |  |  | 24 |  |  | 7
|  | $ | 2,773 |  | $ | 1,578 |  | $ | (1,291) |  | $ | (661) |  | $ | 1,482 |  | $ | 917
Schedule of Reported Revenues Net of Collection Allowance [Table Text Block] |
|  | For the Three Months Ended March 31,
|  | Revenues, net of |  |  |  |
(dollars in thousands) |  | Contractual Allowances |  | Allowances for doubtful |  |
|  | and adjustments |  | accounts |  | Total
|  | 2020 |  | 2019 |  | 2020 |  | 2019 |  | 2020 |  | 2019
Medicaid |  | $ | 9 |  | $ | 3 |  | $ | (8) |  | $ | (3) |  | $ | 1 |  | $ | —
Medicare |  |  | 524 |  |  | 394 |  |  | (79) |  |  | (59) |  |  | 445 |  |  | 335
Self-pay |  |  | 50 |  |  | 4 |  |  | — |  |  | — |  |  | 50 |  |  | 4
Third party payers |  |  | 517 |  |  | 356 |  |  | (179) |  |  | (142) |  |  | 338 |  |  | 214
Contract diagnostics |  |  | 358 |  |  | 153 |  |  | — |  |  | — |  |  | 358 |  |  | 153
|  |  | 1,458 |  |  | 910 |  |  | (266) |  |  | (204) |  |  | 1,192 |  |  | 706
Clinical research grants and other |  |  | 24 |  |  | 7 |  |  | — |  |  | — |  |  | 24 |  |  | 7
|  | $ | 1,482 |  | $ | 917 |  | $ | (266) |  | $ | (204) |  | $ | 1,216 |  | $ | 713
Schedule of Receivables |
(dollars in thousands) |  | March 31, 2020 |  | December 31, 2019
Medicaid |  | $ | 31 |  | $ | 107
Medicare |  |  | 1,692 |  |  | 814
Self-pay |  |  | 65 |  |  | 88
Third party payers |  |  | 1,710 |  |  | 2,203
Contract diagnostic services |  |  | 327 |  |  | 36
|  | $ | 3,825 |  | $ | 3,248
Less allowance for doubtful accounts |  |  | (2,942) |  |  | (2,674)
Accounts receivable, net |  | $ | 883 |  | $ | 574
Schedule of Allowance for Doubtful Accounts |
|  |  |  |  | Allowance for
|  |  |  |  | Doubtful
(dollars in thousands) |  |  |  |  | Accounts
Balance, January 1, 2020 |  |  |  |  | $ | (2,674)
Collection Allowance: |  |  |  |  |  |
Medicaid |  | $ | (8) |  |  |
Medicare |  |  | (79) |  |  |
Third party payers |  |  | (179) |  |  |
|  |  | (266) |  |  |
Bad debt expense |  | $ | (2) |  |  |
Total charges |  |  |  |  |  | (268)
Balance, March 31, 2020 |  |  |  |  | $ | (2,942)
Schedule of Customer Revenue and Accounts Receivable Concentrations | Customers that accounted for 10% or greater of our net sales or accounts receivable for the identified periods is as follows:
|  | Net sales |  |  |  |
|  | Three Months Ended |  |  | Accounts receivable, as of |
|  | March 31, |  |  | March 31, |  | December 31, |
|  | 2020 |  | 2019 |  |  | 2020 |  | 2019 |
Customer A |  | 27 | % | * |  |  | 33 | % | * |
Customer B |  | 10 | % | * |  |  | 28 | % | 17 | %
Customer C |  | * |  | * |  |  | * |  | 12 | %
Customer D |  | * |  | 22 | % |  | * |  | * |
* represents less than 10% |  |  |  |  |  |  |  |  |  |

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