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STOCK TRANSACTIONS (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 10, 2023 | May 08, 2023 | Jul. 02, 2021 | Sep. 30, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Jul. 25, 2023 | Jul. 24, 2023 | Jun. 28, 2023 | Jun. 27, 2023 | Dec. 31, 2022
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  |  |  | 185,000,000 | 185,000,000 |  | 185,000,000 | 144,000,000 |  |  | 144,000,000
Exercise of warrants (in shares) | 237,012 |  |  | 0 |  |  |  |  |  |  |
Exercise of warrants |  |  |  |  | $ 712 | $ 2 |  |  |  |  |
Exercise of warrants |  | $ 700 |  |  | 712 | 2 |  |  |  |  |
Warrants issued to purchase common stock | 845,000 |  |  |  |  |  |  |  |  |  |
Stock issuance proceeds |  |  |  |  | $ 23,954 | $ 4,161 |  |  |  |  |
2006 Employee Stock Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under share-based payment arrangement |  |  |  |  |  |  |  |  | 12,475,171 | 8,475,171 |
2024 Notes |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Converted instrument, shares issued |  |  |  | 0 | 4,691,623 |  |  |  |  |  |
Paid to the converting holders |  |  |  |  | $ 900 |  |  |  |  |  |
Decrease in principal amount |  |  |  |  | $ 8,300 |  |  |  |  |  |
ATM Equity Offering Sales Agreement |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of shares issued (in shares) |  |  | 3,296,123 | 0 | 12,560,150 |  |  |  |  |  |
Stock issuance proceeds |  |  | $ 13,800 |  | $ 24,900 |  |  |  |  |  |
Private Placement |  |  |  |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Exercise of warrants (in shares) |  | 301,810 |  |  |  |  |  |  |  |  |

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