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STOCKHOLDERS' EQUITY (Common Stock, 2018 Purchase Agreement and LP Purchase Agreement) (Details) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 21, 2023 | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) shares | Dec. 20, 2018 shares | Dec. 19, 2018 shares
Class of Stock [Line Items] |  |  |  |  |
Common stock, shares authorized (in shares) |  | 150,000,000 | 150,000,000 | 250,000,000 | 150,000,000
Proceeds from exercise of warrants | $ |  |  | $ 11,000 |  |
Reverse stock split | 0.05 |  |  |  |
Shares issued (in shares) |  | 1,420,125 | 1,141,013 |  |
Common stock, shares outstanding (in shares) |  | 1,420,125 | 1,141,013 |  |
Issuance of common stock, net of issuance costs | $ |  | $ 2,245,000 | $ 129,000 |  |
Issuance of common stock for consulting services | $ |  | $ 177,000 |  |  |
Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds upon issuance of common stock from exercise of warrants (in shares) |  | 15,972 | 1,340 |  |
Shares issued (in shares) |  | 30,852 | 4,251 |  |
Issuance of common stock for consulting services (in shares) |  | 23,598 |  |  |
Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds upon issuance of common stock from exercise of warrants (in shares) |  | 15,972 | 1,340 |  |
Warrant exercises in period |  | 15,972 | 1,340 |  |
Proceeds from exercise of warrants | $ |  | $ 0 | $ 11,000 |  |
Issuance of common stock for consulting services (in shares) |  | 23,598 |  |  |
Issuance of common stock for consulting services | $ |  | $ 200,000 |  |  |
Preferred Class B |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Conversion price (in dollars per share) | $ / shares |  | $ 8.00 |  |  |
Maximum [Member] | Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds from exercise of warrants | $ |  |  | $ 100,000 |  |

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