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INVESTMENTS - Activity in Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Investments rollforward |  |
Additions/transfers during the period | $ 1,777 |
Unrealized gain (loss) on securities held | 28 |
Fair Value end of the period | 1,806 |
Marketable equity securities |  |
Investments rollforward |  |
Opening balance |  | $ 1,885
Additions/transfers during the period | 1,616 |
Net gain (loss) on securities sold |  | (619)
Disposals/transfers during period |  | $ (1,266)
Unrealized gain (loss) on securities held | 28 |
Fair Value end of the period | 1,644 |
Warrants |  |
Investments rollforward |  |
Additions/transfers during the period | 162 |
Fair Value end of the period | $ 162 |

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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740 + Details
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- Definition Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117546-209714 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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