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EQUITY AND LONG-TERM INVESTMENTS AND FAIR VALUE MEASUREMENTS - Equity Investment in Nanolive (Details) - Nanolive [Member] SFr in Millions, $ in Millions | Feb. 18, 2022 USD ($) shares | Feb. 18, 2022 CHF (SFr) shares | Dec. 31, 2023 USD ($) Director | Dec. 31, 2022 USD ($)
--- | --- | --- | --- | ---
Equity Investment |  |  |  |
Transaction costs to acquire equity securities | $ | $ 0.7 |  |  |
Number of Investee's Board members currently representing the Company | Director |  |  | 0 |
Number of the Investee's Board members | Director |  |  | 6 |
Fair value of equity securities | $ |  |  | $ 10.6 | $ 10.6
Consolidated Investees |  |  |  |
Equity Investment |  |  |  |
Equity investment ownership percentage |  |  | 15.30% | 15.50%
Series C preferred stock |  |  |  |
Equity Investment |  |  |  |
Number of shares to be purchased under the securities purchase agreement | shares | 18,750,000 | 18,750,000 |  |
Amount of securities purchase agreement | $ 9.8 | SFr 9.0 |  |

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