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Marketable Securities (Tables)
4 Months Ended
Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of marketable securities include investments in equity securities
   December 31,
2021
   August 31,
2021
 
Short-term:        
D.N.A (see b below)  $863   $701 
Entera (see c below)   337    571 
Held to maturity bonds (see d below)   6,547    4,579 
   $7,747   $5,851 
Long-term:          
Held to maturity bonds (see d below)  $3,875   $6,692 
   $11,622   $12,543 

 

Schedule of amortized cost and estimated fair value of held-to-maturity securities
   December 31, 2021 
   Amortized cost   Gross unrealized gains (losses)  

 

Estimated
fair value

  

Average

yield to maturity

rate

 
Short-term:                
Commercial bonds  $6,432   $(115)  $6,317    1.37%
Accrued interest   115    
-
    115      
                     
Long-term   3,875    (29)   3,846    1.20%
   $10,422   $(144)  $10,278      

 

   August 31, 2021 
   Amortized cost   Gross unrealized gains (losses)  

 

Estimated
fair value

  

Average

yield to maturity

rate

 
Short-term:                
Commercial bonds  $4,463   $(98)  $4,365    1.73%
Accrued interest   116    
-
    116      
                     
Long-term   6,692    610    7,302    1.08%
   $11,271   $512   $11,783