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Note 13 - Selected Statements of Income Data - Financial Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Interest income	$ 4,362	$ 3,190	$ 1,873
Gain (loss) on available-for-sale marketable securities, net	90	(55)	13
Amortization of premium on available-for-sale marketable securities, net	124	(397)	(420)
Foreign exchange gain (loss), net	688	74	(1,269)
Total	$ 5,264	$ 2,812	$ 197

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Amount of accretion of purchase discount (premium) on nonoperating securities.

+ References

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Amount of unrealized gain (loss) on 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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Amount, before tax, of realized and unrealized gain (loss) from foreign currency transaction.

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