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Marketable Equity Securities (Details 1) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Marketable Equity Securities
Marketable Equity Securities At Cost	$ 1,440	$ 1,440
Cumulative Unrealized Loss On Marketable Equity Securities	(162)	(491)
Investments in marketable equity securities, at fair value	$ 1,278	$ 949

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Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value.

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