BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Long Lived Assets (Details) - USD ($) $ in Thousands |
Jun. 30, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Total long-lived assets-net | $ 49,065 | $ 38,710 |
| North America | ||
| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Total long-lived assets-net | 34,894 | 24,316 |
| Finland | ||
| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Total long-lived assets-net | 11,591 | 12,153 |
| Sweden | ||
| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Total long-lived assets-net | 2,550 | 2,212 |
| Other | ||
| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Total long-lived assets-net | 30 | 29 |
| Long-lived assets related to foreign operations | ||
| Impaired Long-Lived Assets Held and Used [Line Items] | ||
| Total long-lived assets-net | $ 14,171 | $ 14,394 |