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Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Stockholders' Equity Note [Abstract] |
Schedule of compensation costs charged against income for the 2011 share incentive plan |
|  | Years Ended December 31, |
|  | 2 0 2 2 |  |  | 2 0 2 1 |  |  | 2 0 2 0 |
|  | U.S. dollars in thousands |
Cost of revenues |  | $ | 63 |  |  | $ | 49 |  |  | $ | 65 |
Research and development expenses |  |  | 159 |  |  |  | 90 |  |  |  | 109 |
Selling and marketing expenses |  |  | 1 |  |  |  | 4 |  |  |  | 9 |
General and administrative expenses |  |  | 35 |  |  |  | 28 |  |  |  | 30 |
|  | $ | 258 |  |  | $ | 171 |  |  | $ | 213 |
Schedule of status of the 2011 share incentive plan |
|  | Years Ended December 31, |
|  | 2 0 2 2 |  |  | 2 0 2 1 |  |  | 2 0 2 0 |
|  | Number |  |  | Weighted average exercise price |  |  | Number |  |  | Weighted average exercise price |  |  | Number |  |  | Weighted average exercise price |
Options outstanding at the beginning of year |  |  | 269,500 |  |  | $ | 0.003 |  |  |  | 266,500 |  |  | $ | 0.003 |  |  |  | 352,000 |  |  | $ | 0.23 |
Changes during year: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (a) |  |  | 304,000 |  |  | $ | 0.003 |  |  |  | 172,000 |  |  | $ | 0.003 |  |  |  | 64,000 |  |  | $ | 0.003 |
Exercised |  |  | (67,000 | ) |  | $ | 0.003 |  |  |  | (71,500 | ) |  | $ | 0.003 |  |  |  | (89,500 | ) |  | $ | 0.003 |
Forfeited |  |  | (54,000 | ) |  | $ | 0.003 |  |  |  | (96,500 | ) |  | $ | 0.003 |  |  |  | (56,000 | ) |  | $ | 1.233 |
Expired |  |  | - |  |  | $ | 0.003 |  |  |  | (1,000 | ) |  | $ | 0.003 |  |  |  | (4,000 | ) |  | $ | 2.688 |
Options outstanding at the end of year |  |  | 452,500 |  |  | $ | 0.003 |  |  |  | 269,500 |  |  | $ | 0.003 |  |  |  | 266,500 |  |  | $ | 0.003 |
Options exercisable at the end of year |  |  | 25,500 |  |  | $ | 0.003 |  |  |  | 30,000 |  |  | $ | 0.003 |  |  |  | 23,000 |  |  | $ | 0.003 |
Weighted average grant date fair value of options granted during the year (b) |  |  |  |  |  | $ | 1.58 |  |  |  |  |  |  | $ | 1.79 |  |  |  |  |  |  | $ | 1.32 |
(a) | In the years ended December 31, 2022 and 2021 and 2020, the options were granted with an exercise price equal to par value of NIS 0.01 ($0.003).
(b) | The fair value of each stock option granted is computed on the date of grant according to the Black-Scholes option pricing model with the following assumptions:
Schedule of stock option granted is computed on the date of grant according to the black-scholes option pricing model |
|  | Years Ended December 31, |
|  | 2 0 2 2 |  |  | 2 0 2 1 |  |  | 2 0 2 0 |
Dividend yield |  |  | 9.69 | % |  |  | 8.73 | % |  |  | 10.3 | %
Expected volatility* |  |  | 30 | % |  |  | 34 | % |  |  | 22 | %
Average risk-free interest rate |  |  | 1.99 | % |  |  | 0.81 | % |  |  | 0.53 | %
Expected average term - in years |  |  | 3.88 |  |  |  | 3.88 |  |  |  | 3.88 |
* | Volatility is based on historical volatility of the Company’s share price for periods matching the expected term of the option until exercise.
Schedule of information about options outstanding and exercisable |
|  |  | Options Outstanding |  |  | Options Exercisable |
|  |  | Number |  |  | Weighted |  |  |  |  |  | Number |  |  | Weighted |  |  |  |
|  |  | outstanding |  |  | average |  |  | Weighted |  |  | exercisable |  |  | average |  |  | Weighted |
Range of |  |  | at |  |  | remaining |  |  | average |  |  | at |  |  | remaining |  |  | average |
exercise |  |  | December 31, |  |  | contractual |  |  | exercise |  |  | December 31, |  |  | contractual |  |  | exercise |
prices |  |  | 2022 |  |  | life |  |  | price |  |  | 2022 |  |  | life |  |  | price |
|  |  |  |  |  | Years |  |  |  |  |  |  |  |  | Years |  |  |  |
$ | 0.003 |  |  |  | 452,500 |  |  |  | 3.7 |  |  | $ | 0.003 |  |  |  | 25,500 |  |  |  | 1.45 |  |  | $ | 0.003 |

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