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Marketable Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract] |
Schedule of held-to-maturity securities |
|  |  |  |  | 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.
Schedule of reconciliation of marketable securities |
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 |
Schedule of investment securities in unrealized loss position |
|  | 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 |

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