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COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS - Stock-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | $ 571 | $ 989 | $ 1,391 | $ 1,949
Cost of goods sold |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 32 |  | 88 |
Research and development, net of grant income |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 110 |  | 247 |
Selling, general and administrative |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 429 | 989 | 1,056 | 1,949
Stock-options |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 400 | 800 | 1,100 | 1,500
Restricted stock-units ("RSUs") |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | $ 100 | $ 200 | $ 300 | $ 400

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