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FAIR VALUE MEASUREMENTS AND INVESTMENTS - Recurring (Details) - Recurring basis - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Fair value measurements |  |
Total assets and liabilities measured at fair value | $ (19,061) | $ (21,561)
Short Term Investments |  |
Fair value measurements |  |
Investments | 300 | 300
Other investments |  |
Fair value measurements |  |
Investments | 1,076 | 1,197
Employee benefit plan investments |  |
Fair value measurements |  |
Investments | 2,991 | 3,014
Redeemable common units | Alloy Inc |  |
Fair value measurements |  |
Financial instruments | (14,760) | (14,760)
Redeemable common units | Alaska communications |  |
Fair value measurements |  |
Financial instruments | (8,419) | (11,063)
Warrants | Alaska communications |  |
Fair value measurements |  |
Financial instruments | (249) | (249)
Level 1 |  |
Fair value measurements |  |
Total assets and liabilities measured at fair value | 3,291 | 3,314
Level 1 | Short Term Investments |  |
Fair value measurements |  |
Investments | 300 | 300
Level 1 | Employee benefit plan investments |  |
Fair value measurements |  |
Investments | 2,991 | 3,014
Level 3 |  |
Fair value measurements |  |
Total assets and liabilities measured at fair value | (22,352) | (24,875)
Level 3 | Other investments |  |
Fair value measurements |  |
Investments | 1,076 | 1,197
Level 3 | Redeemable common units | Alloy Inc |  |
Fair value measurements |  |
Financial instruments | (14,760) | (14,760)
Level 3 | Redeemable common units | Alaska communications |  |
Fair value measurements |  |
Financial instruments | (8,419) | (11,063)
Level 3 | Warrants | Alaska communications |  |
Fair value measurements |  |
Financial instruments | $ (249) | $ (249)

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