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Supplementary Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2024
Supplementary Balance Sheet Information [Abstract] |
Schedule of Cash and Short Term Bank Deposits | Cash, cash equivalents and short-term bank deposits:
|  | December 31, |
|  | 2 0 2 4 |  |  | 2 0 2 3 |
|  | U.S. dollars in |
|  | thousands |
Cash |  | $ | 2,960 |  |  | $ | 2,187 |
Cash equivalents |  |  | 1,492 |  |  |  | 771 |
Total cash and cash equivalents |  | $ | 4,452 |  |  | $ | 2,958 |
Short-term bank deposits* |  | $ | 11,108 |  |  | $ | 13,464 |
| * | The average interest rate on short-term deposits is 5.09% and 6.05%, as of December 31, 2024 and 2023, respectively.
Schedule of Other Current Assets | Other current assets:
|  | December 31, |
|  | 2 0 2 4 |  |  | 2 0 2 3 |
|  | U.S. dollars in |
|  | thousands |
Government institutions |  | $ | 135 |  |  | $ | 114 |
Employees |  |  | 10 |  |  |  | 9 |
Interest receivable |  |  | 258 |  |  |  | 344 |
Sundry |  |  | 90 |  |  |  | 71 |
|  | $ | 493 |  |  | $ | 538 |
Schedule of Other Current Liabilities and Accruals | Other current liabilities and accruals:
|  | December 31, |
|  | 2 0 2 4 |  |  | 2 0 2 3 |
|  | U.S. dollars in |
|  | thousands |
Payroll and related expenses |  | $ | 801 |  |  | $ | 814 |
Government institutions |  |  | 194 |  |  |  | 135 |
Accrued vacation pay |  |  | 77 |  |  |  | 68 |
Accrued expenses and sundry |  |  | 397 |  |  |  | 732 |
|  | $ | 1,469 |  |  | $ | 1,749 |

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