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Note 6 - Marketable Securities (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Marketable Securities, Gain (Loss)	$ 0	$ (590)	$ 575	$ (7,956)
Marketable Securities					$ 37,126
Debt Securities, Available-for-Sale					3,675
Equity Securities, FV-NI, Unrealized Gain (Loss)		$ (602)	$ 3,117	(7,940)
Debt Securities, Available-for-Sale, Unrealized Loss Position					$ 2,627
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale				$ 0

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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X

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss.

+ References

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- Definition

Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

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Amount of investment in marketable security.

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Amount of unrealized and realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI).

+ References

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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