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COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS - Stock-Based Compensation (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | $ 488 | $ 891 | $ 1,879 | $ 2,840
Cost of goods sold |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 29 | 48 | 114 | 48
Research and development, net of grant income |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 83 |  | 330 |
Selling, general and administrative |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 376 | 843 | 1,435 | 2,792
Stock-options |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | 400 | 800 | 1,500 | 2,300
Restricted stock-units ("RSUs") |  |  |  |
COMMON STOCK, STOCK-BASED COMPENSATION AND WARRANTS |  |  |  |
Total stock-based compensation expense | $ 100 | $ 100 | $ 400 | $ 500

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