| MARKETABLE SECURITIES | 
 NOTE
F – MARKETABLE SECURITIES 
Marketable
securities as of March 31, 2023 and December 31, 2022 were composed of the following:  
  
    |  Schedule of marketable securities | 
    March
    31, 2023 | 
 
   
  
    |   | 
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  | 
 
    |   | 
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     | 
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     | 
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     | 
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     | 
  | 
 
  
    |   | 
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      | 
  | 
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      | 
  | 
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      | 
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      | 
  | 
 
  
    | Certificates of deposit | 
  | 
    $ | 
2,976,000 | 
  | 
  | 
    $ | 
21,000 | 
  | 
  | 
    $ | 
— | 
  | 
  | 
    $ | 
2,997,000 | 
  | 
 
  
    | Government securities | 
  | 
      | 
25,992,000 | 
  | 
  | 
      | 
204,000 | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
26,196,000 | 
  | 
 
  
    | Fixed income mutual funds | 
  | 
      | 
7,504,000 | 
  | 
  | 
      | 
45,000 | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
7,549,000 | 
  | 
 
  
    | Corporate bond | 
  | 
      | 
178,000 | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
178,000 | 
  | 
 
  
    |   | 
  | 
      | 
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  | 
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      | 
  | 
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      | 
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      | 
  | 
  | 
 
  
    | Total marketable securities | 
  | 
    $ | 
36,650,000 | 
  | 
  | 
    $ | 
270,000 | 
  | 
  | 
    $ | 
— | 
  | 
  | 
    $ | 
36,920,000 | 
  | 
 
  
    |   | 
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      | 
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  | 
 
   
  
 
  
  
    |   | 
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     | 
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     | 
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     | 
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     | 
  | 
 
  
    |   | 
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      | 
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      | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
 
  
    | Government Securities | 
  | 
    $ | 
20,781,000 | 
  | 
  | 
    $ | 
67,000 | 
  | 
  | 
    $ | 
— | 
  | 
  | 
    $ | 
20,848,000 | 
  | 
 
  
    | Fixed income mutual funds | 
  | 
      | 
11,904,000 | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
(915,000 | 
) | 
  | 
      | 
10,989,000 | 
  | 
 
  
    | Certificates of Deposit | 
  | 
      | 
3,019,000 | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
(43,000 | 
) | 
  | 
      | 
2,976,000 | 
  | 
 
  
    | Corporate bonds and notes | 
  | 
      | 
192,000 | 
  | 
  | 
      | 
— | 
  | 
  | 
      | 
(14,000 | 
) | 
  | 
      | 
178,000 | 
  | 
 
  
    |   | 
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      | 
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      | 
  | 
  | 
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      | 
  | 
  | 
  | 
      | 
  | 
  | 
 
  
    | Total marketable securities | 
  | 
    $ | 
35,896,000 | 
  | 
  | 
    $ | 
67,000 | 
  | 
  | 
    $ | 
(972,000 | 
) | 
  | 
    $ | 
34,991,000 | 
  | 
 
   
  
  
The Company’s marketable securities
are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices in an active market.  
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