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Selected Statements of Income Data (Tables)
12 Months Ended
Dec. 31, 2018
Selected Statements of Income Data [Abstract]  
Schedule of research and development costs, net
  Year ended December 31, 
   2016   2017   2018 
             
Total costs  $10,063   $10,713   $9,362 
Less - capitalized software costs   (4,224)   (3,771)   (3,666)
                
Research and development, net  $5,839   $6,942   $5,696 
Schedule of financial income (expenses), net
Bank charges and interest from loans offset by interest from short term deposits  $(199)  $(1,124)  $(986)
Interest expenses related to liabilities in connection with acquisitions   (257)   (62)   (4)
Interest income from marketable securities, net of amortization of premium on marketable securities   240    284    284 
Gain (loss) arising from foreign currency translation and other   (214)   (809)   855 
                
Financial income (expenses), net  $(430)  $(1,711)  $149