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INVESTMENT IN EQUITY SECURITIES (Details) € in Thousands, $ in Thousands |  |  | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 01, 2020 USD ($) | Oct. 01, 2019 | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2009 EUR (€) | Jan. 01, 2020 USD ($) | Dec. 31, 2019 USD ($) | Aug. 31, 2019 USD ($)
Other Investments |  |  | $ 3,794 |  |  |  |  | $ 3,538 |
Total equity method and other investments |  |  | 44,193 |  |  |  |  | 8,396 |
Investment in unconsolidated affiliate |  |  | 34,044 |  |  |  |  |  |
Proceeds from sale of investment in equity securities |  |  |  | $ 16,487 |  |  |  |  |
Investment impairment |  |  | 0 |  |  |  |  |  |
Preferred equity stocks |  |  |  |  |  |  |  |  |
Other Investments |  |  |  |  |  |  |  |  | $ 3,500
Number of preferred equity investments |  |  |  |  |  |  |  |  | 2
Sonmol |  |  |  |  |  |  |  |  |
Equity method investments |  |  | 4,969 |  |  |  |  |  |
Investment in unconsolidated affiliate | $ 5,000 |  |  |  |  |  |  |  |
Ownership percentage of equity method investment | 30.00% |  |  |  |  |  |  |  |
BTY |  |  |  |  |  |  |  |  |
Equity method investments |  |  | 30,894 |  |  |  | $ 32,000 | 119 |
Ownership percentage of equity method investment |  |  |  |  |  |  | 49.00% |  |
Payment for equity method investment |  |  | 28,800 |  |  |  |  |  |
Obligation associated with an agreement to acquire equity method investement |  |  | 3,200 |  |  |  |  |  |
BTY | Strategic Definitive Agreement |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  | 49.00% |  |  |  |  |  |  |
Initial lock-up period |  | 5 years |  |  |  |  |  |  |
Second lock-up period |  | 3 years |  |  |  |  |  |  |
BTY | Strategic Definitive Agreement | Call Option | Minimum |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  | 26.00% |  |  |  |  |  |  |
BTY | Strategic Definitive Agreement | Call Option | Maximum |  |  |  |  |  |  |  |  |
Ownership percentage of equity method investment |  | 31.00% |  |  |  |  |  |  |
Kali Care |  |  |  |  |  |  |  |  |
Equity method investments |  |  | 3,691 |  |  |  |  | 3,881 |
Investment in unconsolidated affiliate |  |  |  |  | $ 5,000 |  |  |  |
Ownership percentage of equity method investment |  |  |  |  | 20.00% |  |  |  |
Desotec GmbH |  |  |  |  |  |  |  |  |
Equity method investments |  |  | $ 845 |  |  |  |  | $ 858 |
Investment in unconsolidated affiliate | € |  |  |  |  |  | € 574 |  |  |
Ownership percentage of equity method investment |  |  |  |  |  | 23.00% |  |  |

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