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STOCK-BASED COMPENSATION PLANS (Tables) | 6 Months Ended
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Jun. 30, 2025
STOCK-BASED COMPENSATION PLANS |
Schedule of activity related to unvested restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant Date
​ | ​ | Shares | ​ | Fair Value
Unvested balance at January 1, 2025 |  | 3,997,108 | ​ | $ | 3.04
Granted |  | 7,443,156 | ​ | $ | 3.63
Vested |  | (2,621,202) | ​ | $ | 3.08
Forfeited |  | (68,081) | ​ | $ | 3.31
Unvested balance at June 30, 2025 |  | 8,750,981 | ​ | $ | 3.53
Schedule of activity related to performance based stock units | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant Date
​ | ​ | Shares | ​ | Fair Value
Unvested balance at January 1, 2025 |  | 3,605,892 | ​ | $ | 3.75
Granted |  | 1,837,965 | ​ | $ | 4.20
Vested |  | (381,177) | ​ | $ | 3.57
Forfeited |  | (260,786) | ​ | $ | 3.03
Unvested balance at June 30, 2025 |  | 4,801,894 | ​ | $ | 3.97
Schedule of stock-based compensation expenses which are Included in consolidated statement of operations | The condensed consolidated statements of operations include stock-based compensation for the three and six months ended June 30, 2025 and 2024 as follows (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended | ​ | Six months ended | ​
​ | ​ | June 30, | ​ | June 30, | ​ | June 30, | ​ | June 30, | ​
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024 |
Product cost of revenue | ​ | $ | 33 |  | $ | 64 |  | $ | 99 |  | $ | 170 | ​
Service cost of revenue |  | ​ | 198 |  | ​ | 274 |  | ​ | 484 |  | ​ | 746 |
Research and development |  | ​ | 455 | ​ | ​ | 616 | ​ | ​ | 1,180 | ​ | ​ | 1,684 |
Sales and marketing | ​ | ​ | 1,066 | ​ | ​ | 954 | ​ | ​ | 2,239 | ​ | ​ | 2,111 | ​
General and administrative | ​ | ​ | 2,725 | ​ | ​ | 1,586 | ​ | ​ | 4,773 | ​ | ​ | 3,305 | ​
​ | ​ | $ | 4,477 |  | $ | 3,494 |  | $ | 8,775 |  | $ | 8,016 | ​

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