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SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE (Tables) | 6 Months Ended
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Jun. 30, 2019
SALES SERVICE REVENUE, NET AND ACCOUNTS RECEIVABLE [Abstract] |
Schedule of Net Revenues |
|  | For the Three Months Ended June 30,
(dollars in thousands) |  | Diagnostic Testing |  | Biomarker Testing |  | Total
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Medicaid |  | $ | 9 |  | $ | 11 |  | $ | — |  | $ | — |  | $ | 9 |  | $ | 11
Medicare |  |  | 450 |  |  | 281 |  |  | — |  |  | — |  |  | 450 |  |  | 281
Self-pay |  |  | 11 |  |  | 20 |  |  | — |  |  | — |  |  | 11 |  |  | 20
Third party payers |  |  | 451 |  |  | 219 |  |  | — |  |  | — |  |  | 451 |  |  | 219
Contract diagnostics |  |  | — |  |  | — |  |  | 274 |  |  | 368 |  |  | 274 |  |  | 368
Service revenue, net |  | $ | 921 |  | $ | 531 |  | $ | 274 |  | $ | 368 |  | $ | 1,195 |  | $ | 899
|  | For the Six Months Ended June 30,
(dollars in thousands) |  | Diagnostic Testing |  | Biomarker Testing |  | Total
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Medicaid |  | $ | 12 |  | $ | 23 |  | $ | — |  | $ | — |  | $ | 12 |  | $ | 23
Medicare |  |  | 844 |  |  | 415 |  |  | — |  |  | — |  |  | 844 |  |  | 415
Self-pay |  |  | 15 |  |  | 46 |  |  | — |  |  | — |  |  | 15 |  |  | 46
Third party payers |  |  | 807 |  |  | 350 |  |  | — |  |  | — |  |  | 807 |  |  | 350
Contract diagnostics |  |  | — |  |  | — |  |  | 427 |  |  | 856 |  |  | 427 |  |  | 856
Service revenue, net |  | $ | 1,678 |  | $ | 834 |  | $ | 427 |  | $ | 856 |  | $ | 2,105 |  | $ | 1,690
Schedule of Gross to Net Sales Adjustments | The following table presents our revenues initially recognized for each associated payer class during the three and six months ended June 30, 2019 and 2018.
|  | For the Three Months Ended June 30,
(dollars in thousands) |  |  |  | Contractual Allowances and |  | Revenues, net of Contractual
|  | Gross Revenues |  | adjustments |  | Allowances and adjustments
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Medicaid |  | $ | 12 |  | $ | 26 |  | $ | (3) |  | $ | (15) |  | $ | 9 |  | $ | 11
Medicare |  |  | 467 |  |  | 292 |  |  | (17) |  |  | (11) |  |  | 450 |  |  | 281
Self-pay |  |  | 11 |  |  | 20 |  |  | — |  |  | — |  |  | 11 |  |  | 20
Third party payers |  |  | 1,571 |  |  | 531 |  |  | (1,120) |  |  | (312) |  |  | 451 |  |  | 219
Contract diagnostics |  |  | 274 |  |  | 368 |  |  | — |  |  | — |  |  | 274 |  |  | 368
|  |  | 2,335 |  |  | 1,237 |  |  | (1,140) |  |  | (338) |  |  | 1,195 |  |  | 899
Clinical research grants and other |  |  | 4 |  |  | 60 |  |  | — |  |  | — |  |  | 4 |  |  | 60
|  | $ | 2,339 |  | $ | 1,297 |  | $ | (1,140) |  | $ | (338) |  | $ | 1,199 |  | $ | 959
(dollars in thousands) |  | For the Six Months Ended June 30,
|  |  |  | Contractual Allowances and |  | Revenues, net of Contractual
|  | Gross Revenues |  | adjustments |  | Allowances and adjustments
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Medicaid |  | $ | 15 |  | $ | 41 |  | $ | (3) |  | $ | (18) |  | $ | 12 |  | $ | 23
Medicare |  |  | 861 |  |  | 429 |  |  | (17) |  |  | (14) |  |  | 844 |  |  | 415
Self-pay |  |  | 15 |  |  | 46 |  |  | — |  |  | — |  |  | 15 |  |  | 46
Third party payers |  |  | 2,588 |  |  | 848 |  |  | (1,781) |  |  | (498) |  |  | 807 |  |  | 350
Contract diagnostics |  |  | 427 |  |  | 856 |  |  | — |  |  | — |  |  | 427 |  |  | 856
|  |  | 3,906 |  |  | 2,220 |  |  | (1,801) |  |  | (530) |  |  | 2,105 |  |  | 1,690
Clinical research grants and other |  |  | 11 |  |  | 65 |  |  | — |  |  | — |  |  | 11 |  |  | 65
|  | $ | 3,917 |  | $ | 2,285 |  | $ | (1,801) |  | $ | (530) |  | $ | 2,116 |  | $ | 1,755
Schedule of Reported Revenues Net of Collection Allowance [Table Text Block] |
|  | For the Three Months Ended June 30,
|  | Revenues, net of |  |  |  |
(dollars in thousands) |  | Contractual Allowances |  | Allowances for doubtful |  |
|  | and adjustments |  | accounts |  | Total
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Medicaid |  | $ | 9 |  | $ | 11 |  | $ | (9) |  | $ | (12) |  | $ | — |  | $ | (1)
Medicare |  |  | 450 |  |  | 281 |  |  | (68) |  |  | (42) |  |  | 382 |  |  | 239
Self-pay |  |  | 11 |  |  | 20 |  |  | — |  |  | — |  |  | 11 |  |  | 20
Third party payers |  |  | 451 |  |  | 219 |  |  | (180) |  |  | (88) |  |  | 271 |  |  | 131
Contract diagnostics |  |  | 274 |  |  | 368 |  |  | — |  |  | — |  |  | 274 |  |  | 368
|  |  | 1,195 |  |  | 899 |  |  | (257) |  |  | (142) |  |  | 938 |  |  | 757
Clinical research grants and other |  |  | 4 |  |  | 60 |  |  | — |  |  | — |  |  | 4 |  |  | 60
|  | $ | 1,199 |  | $ | 959 |  | $ | (257) |  | $ | (142) |  | $ | 942 |  | $ | 817
|  | For the Six Months Ended June 30,
|  | Revenues, net of |  |  |  |
(dollars in thousands) |  | Contractual Allowances |  | Allowances for doubtful |  |
|  | and adjustments |  | accounts |  | Total
|  | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Medicaid |  | $ | 12 |  | $ | 23 |  | $ | (12) |  | $ | (23) |  | $ | — |  | $ | —
Medicare |  |  | 844 |  |  | 415 |  |  | (127) |  |  | (62) |  |  | 717 |  |  | 353
Self-pay |  |  | 15 |  |  | 46 |  |  | — |  |  | — |  |  | 15 |  |  | 46
Third party payers |  |  | 807 |  |  | 350 |  |  | (322) |  |  | (141) |  |  | 485 |  |  | 209
Contract diagnostics |  |  | 427 |  |  | 856 |  |  | — |  |  | — |  |  | 427 |  |  | 856
|  |  | 2,105 |  |  | 1,690 |  |  | (461) |  |  | (226) |  |  | 1,644 |  |  | 1,464
Clinical research grants and other |  |  | 11 |  |  | 65 |  |  | — |  |  | — |  |  | 11 |  |  | 65
|  | $ | 2,116 |  | $ | 1,755 |  | $ | (461) |  | $ | (226) |  | $ | 1,655 |  | $ | 1,529
Schedule of Receivables |
(dollars in thousands) |  | June 30, 2019 |  | December 31, 2018
Medicaid |  | $ | 90 |  | $ | 82
Medicare |  |  | 770 |  |  | 633
Self-pay |  |  | 73 |  |  | 108
Third party payers |  |  | 1,852 |  |  | 1,382
Contract diagnostic services |  |  | 269 |  |  | 193
Other |  |  | — |  |  | —
|  | $ | 3,054 |  | $ | 2,398
Less allowance for doubtful accounts |  |  | (2,171) |  |  | (1,708)
Accounts receivable, net |  | $ | 883 |  | $ | 690
Schedule of Allowance for Doubtful Accounts |
|  |  |  |  | Allowance for
|  |  |  |  | Doubtful
(dollars in thousands) |  |  |  |  | Accounts
Balance, January 1, 2019 |  |  |  |  | $ | (1,708)
Collection Allowance: |  |  |  |  |  |
Medicaid |  | $ | (12) |  |  |
Medicare |  |  | (127) |  |  |
Third party payers |  |  | (322) |  |  |
|  |  | (461) |  |  |
Bad debt expense |  | $ | (2) |  |  |
Total charges |  |  |  |  |  | (463)
Balance, June 30, 2019 |  |  |  |  | $ | (2,171)
Schedule of Customer Revenue and Accounts Receivable Concentrations | Customer revenue and accounts receivable concentration amounted to the following for the identified periods.
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2019 |  | 2018 |  |  | 2019 |  | 2018 |
Percentage of net sales by customer: |  |  |  |  |  |  |  |  |  |
Customer A |  | 29 | % | 40 | % |  | 26 | % | 44 | %
Customer B |  | 11 | % | * |  |  | * |  | * |
* represents less than 10% |  |  |  |  |  |  |  |  |  |
|  | June 30, |  |  | December 31, |
|  | 2019 |  |  | 2018 |
Percentage of total accounts receivable by customer: |  |  |  |  |  |
Customer A |  | 28 | % |  | 23 | %
Customer B |  | * |  |  | * |
* represents less than 10% |  |  |  |  |  |

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