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Note 7 - Marketable Securities - Fair Value of Available for Sale Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Adjusted Cost	$ 3,589	$ 5,043
Unrealized Gains	0	0
Unrealized Losses	(2)	(2)
Fair Value	3,587	5,041
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	998	5,043
Unrealized Gains	0	0
Unrealized Losses	0	(2)
Fair Value	998	$ 5,041
US Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Adjusted Cost	2,591
Unrealized Gains	0
Unrealized Losses	(2)
Fair Value	$ 2,589

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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