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Marketable Equity Securities (Details 1) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Marketable Equity Securities |  |
Marketable equity securities at cost | $ 1,440 | $ 1,704
Cumulative unrealized loss on marketable equity securities | 491 | 397
Marketable equity securities at fair value | $ 949 | $ 1,307

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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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