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v3.23.1

Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2022
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, 2022 |  |  |  |  |  |  |  |  |  |  |  |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities and government debt securities |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 4,038 |  |  |  | - |  |  |  | (111 | ) |  |  | 3,927 |
Non-Current (1 to 3 years) |  |  | 15,283 |  |  |  | - |  |  |  | (1,214 | ) |  |  | 14,069 |
|  |  | 19,321 |  |  |  | - |  |  |  | (1,325 | ) |  |  | 17,996 |
At December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities and government debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current |  |  | 8,300 |  |  |  | 43 |  |  |  | (19 | ) |  |  | 8,324 |
Non-Current (1 to 4 years) |  |  | 23,966 |  |  |  | 10 |  |  |  | (512 | ) |  |  | 23,464 |
|  |  | 32,266 |  |  |  | 53 |  |  |  | (531 | ) |  |  | 31,788 |
* | Fair value is being determined using Level 2 inputs.
** | Including accrued interest in the amount of US$ 227 thousand and US$ 138 thousand as of December 31, 2021 and 2022, respectively.
| The accrued interest is presented as part of other receivables on the balance sheet.
Schedule of Reconciliation of Marketable Securities |
Activity in marketable securities in 2022 |  | US$ thousands |
Balance at January 1, 2021 |  |  | 50,810 |
Purchases of marketable securities |  |  | 19,927 |
Changes in marketable securities, net |  |  | (621 | )
Proceeds from maturity of marketable securities |  |  | (37,850 | )
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 December 31, 2022 |  |  | 19,321 |
Schedule of Investment Securities in an Unrealized Loss Position |
|  | Less than 12 months |  |  | 12 months or more |  |  | Total |
|  | Unrealized Losses |  |  | Fair value |  |  | Unrealized Losses |  |  | Fair value |  |  | Unrealized Losses |  |  | Fair value |
Held to maturity:
Corporate debt securities and government debt securities |  |  | (301 | ) |  |  | 4,595 |  |  |  | (1,024 | ) |  |  | 13,401 |  |  |  | (1,325 | ) |  |  | 17,996 |

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