XML 68 R28.htm IDEA: XBRL DOCUMENT v3.20.1
Severance Pay (Tables)
12 Months Ended
Dec. 31, 2019
Retirement Benefits [Abstract]  
Summary of amounts accrued and the portions funded, with severance pay funds and by the insurance policies
   December 31, 
   2 0 1 9   2 0 1 8 
   U.S. dollars in thousands 
         
Accrued severance pay  $1,775   $1,517 
Less - amounts funded (presented in "investment and other non-current assets")   (1,725)   (1,439)
           
Unfunded balance  $50   $78