STOCK-BASED COMPENSATION PLANS - Summary of stock-based compensation expenses (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| STOCK-BASED COMPENSATION PLANS | ||||
| Total stock based compensation expense | $ 317 | $ 770 | $ 1,453 | $ 2,345 |
| Costs of revenue - devices and supplies | ||||
| STOCK-BASED COMPENSATION PLANS | ||||
| Total stock based compensation expense | 8 | 10 | 29 | 27 |
| Sales and marketing expense | ||||
| STOCK-BASED COMPENSATION PLANS | ||||
| Total stock based compensation expense | (31) | 125 | 125 | 492 |
| General and administrative | ||||
| STOCK-BASED COMPENSATION PLANS | ||||
| Total stock based compensation expense | $ 340 | $ 635 | $ 1,299 | $ 1,826 |