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BUSINESS DESCRIPTION (Narrative) (Details) - USD ($) |  |  |  | 3 Months Ended | 12 Months Ended | 36 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 26, 2020 | Jan. 15, 2019 | Sep. 07, 2018 | Mar. 25, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2020 | Apr. 30, 2020 | Apr. 13, 2020 | Apr. 09, 2020
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Accumulated Net Income (Loss) |  |  |  |  | $ 10,600,000 |  |  | $ 10,600,000 |  |  |
Working deficiency |  |  |  |  | 500,000 |  |  | 500,000 |  |  |
Net cash used in operating activities |  |  |  |  | (7,434,000) | $ (9,141,000) |  |  |  |  |
Proceeds from issuance of common stock |  |  |  |  | 8,929,000 | $ 6,628,000 |  |  |  |  |
Proceeds from long-term debt |  |  |  |  | $ 787,000 |  |  |  |  |  |
Maximum aggregate initial offering price |  |  |  |  |  |  |  |  |  | $ 50,000,000 | $ 50,000,000
Lincoln Park [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Value of shares issued | $ 10,000,000 |  | $ 10,000,000 |  |  |  |  |  |  |  |
Shares sold in offering (in shares) | 4,980,000 |  |  |  | 1,040,654 | 2,778,077 | 328,590 |  |  |  |
Proceeds from issuance of common stock |  |  |  |  | $ 1,400,000 |  | $ 1,400,000 | $ 9,400,000 |  |  |
Equity purchase agreement value remaining available | $ 1,200,000 |  |  |  |  |  |  |  |  |  |
Lincoln Park [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Value of shares issued |  |  | $ 1,000,000 |  |  |  |  |  |  |  |
Shares sold in offering (in shares) |  |  | 30,000 |  |  |  |  |  |  |  |
LP 2020 Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock | $ 8,800,000 |  |  |  |  |  |  |  |  |  |
Crede Note |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock |  | $ 4,000,000 |  |  |  |  |  |  |  |  |
Subsequent Events | Lincoln Park [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares sold in offering (in shares) |  |  |  | 500,000 |  |  |  |  |  |  |
Proceeds from issuance of common stock |  |  |  | $ 1,300,000 |  |  |  |  |  |  |
Joint Venture |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  | 49.00% |  |
Joint Venture | Poplar Put Right [Member] | Scenario, Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  | 100.00% |  |  | 100.00% |  |  |
Price per share |  |  |  |  | $ 1.00 |  |  | $ 1.00 |  |  |
Purchase price |  |  |  |  | $ 51 |  |  | $ 51 |  |  |
Joint Venture | Popular Healthcare PLLC |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of interest in joint venture |  |  |  |  |  |  |  |  | 51.00% |  |

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