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INVENTORIES, NET - Schedule of Inventories, Net (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Inventory [Line Items] |  |  |  |
Allowance for inventory obsolescence | $ (760) | $ (537) | $ (198) | $ (355)
Total inventories, net | 49,132 | 38,292 |  |
Loose diamonds |  |  |  |
Inventory [Line Items] |  |  |  |
Inventory, gross | 12,970 | 6,097 |  |
Fine jewelry and other |  |  |  |
Inventory [Line Items] |  |  |  |
Inventory, gross | $ 36,922 | $ 32,732 |  |

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