Marketable Securities

12 Months Ended

Dec. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Note 4 - Marketable Securities

The Company's investment in marketable securities as of December 31, 2022 and 2023 are classified as ''held-to-maturity'' and consist of the following:

			Gross		Gross
			unrealized		unrealized
	Amortized		holding		holding			Aggregate
	cost basis**		gains		(losses)			fair value*
	US$ thousands
At December 31, 2023
Held to maturity:
Corporate debt securities and government debt securities
Current		8,022		-		(121	)		7,901
Non-Current (1 to 3 years)		16,742		-		(558	)		16,184
		24,764		-		(679	)		24,085

At December 31, 2022
Held to maturity:
Corporate debt securities and government debt securities
Current		4,038		-		(111	)		3,927
Non-Current (1 to 4 years)		15,283		-		(1,214	)		14,069

		19,321		-		(1,325	)		17,996

*	Fair value is being determined using Level 2 inputs.
**	Including accrued interest in the amount of US$ 138 thousand and US$ 188 thousand as of December 31, 2022 and 2023, respectively.

The accrued interest is presented as part of other receivables on the balance sheet.

Activity in marketable securities in 2023 and 2022	US$ thousands

Balance at January 1, 2022		32,266

Purchases of marketable securities		3,998
Changes in marketable securities, net		(914	)
Proceeds from maturity of marketable securities		(16,029	)

Balance at January 1, 2023		19,321

Purchases of marketable securities		9,623
Changes in marketable securities, net		(180	)
Proceeds from maturity of marketable securities		(4,000	)

Balance at December 31, 2023		24,764

The following table summarizes the gross unrealized losses or gains on investment securities and the fair value of those securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss or gain position, at December 31, 2023:

	Less than 12 months					12 months or more					Total
Held to maturity:	Unrealized Losses			Fair value		Unrealized Losses			Fair value		Unrealized Losses			Fair value

Corporate debt securities and government debt securities		(99	)		8,690		(580	)		15,395		(679	)		24,085

The unrealized losses or gains on the investments were caused by changes in interest rate. The Company has the ability and intent to hold these investments until maturity and it is more likely than not that the Company will not be required to sell any of the securities before recovery.