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BUSINESS DESCRIPTION (Narrative) (Details) - USD ($) |  |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 14 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 02, 2021 | Jun. 26, 2020 | Mar. 26, 2020 | Sep. 07, 2018 | Jun. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Jun. 14, 2021 | Apr. 30, 2020 | Apr. 13, 2020
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Oncology test reporting time |  |  |  |  |  | 1 day |  |  |  |  |  |  |
Net loss |  |  |  |  | $ 4,400,000 |  |  | $ 4,400,000 |  |  |  |  |
Working deficiency |  |  |  |  | 13,300,000 |  |  | 13,300,000 |  |  |  |  |
Net cash used in operating activities |  |  |  |  |  |  |  | (3,048,000) | $ (3,562,000) |  |  |  |
Issuance of common stock in connection with at the market offering, net of issuance costs |  |  |  |  | $ 14,947,000 |  |  | 14,947,000 |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  | $ 16,207,000 | 2,607,000 |  |  |  |
Proceeds from PPP Loan |  |  |  |  |  |  |  |  | $ 787,000 | $ 800,000 |  |  |
Common stock, par value |  |  |  |  | $ 0.01 |  |  | $ 0.01 |  | $ 0.01 |  |  |
Term of test reporting time for patients |  |  |  |  |  |  |  | 1 day |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Oncology test reporting time |  |  |  |  |  |  | 10 days |  |  |  |  |  |
Term of test reporting time for patients |  |  |  |  |  |  |  | 10 days |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Oncology test reporting time |  |  |  |  |  |  | 7 days |  |  |  |  |  |
Term of test reporting time for patients |  |  |  |  |  |  |  | 7 days |  |  |  |  |
Sales Agreement with Alliance Global Partners |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 15,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Maximum aggregate initial offering price |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,000,000.0
Common stock, par value | $ 0.01 |  |  |  |  |  |  |  |  |  |  |  |
Sale of common stock | 4,501,000 |  |  |  |  |  |  |  |  |  |  |  |
Additional shares available for future sales | $ 6,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Sales Agreement with Alliance Global Partners | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 22,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Lincoln Park [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock in connection with at the market offering, net of issuance costs |  |  | $ 10,000,000.0 | $ 10,000,000 |  |  |  |  |  |  |  |  |
Shares sold in offering (in shares) |  |  |  |  |  |  | 110,642 |  | 1,040,654 |  | 4,980,000 |  |
Proceeds from issuance of common stock |  |  |  |  |  |  | $ 100,000 |  | $ 1,400,000 |  |  |  |
Sale of common stock |  | 4,500,000 |  |  |  |  |  |  |  |  |  |  |
LP 2020 Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  |  |  |  |  |  |  | $ 8,800,000 |  |
Joint Venture [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  |  |  |  | 49.00% |
Joint Venture [Member] | Poplar Put Right [Member] | Scenario, Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  |  |  |  | 100.00% |
Price per share |  |  |  |  |  |  |  |  |  |  |  | $ 1.00 |
Purchase price |  |  |  |  |  |  |  |  |  |  |  | $ 51 |
Joint Venture [Member] | Popular Healthcare PLLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  |  |  |  | 51.00% |

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