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Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2019
Revenues Recognition Disclosure [Abstract]  
Schedule of estimated revenue expected to be recognized in future periods related to performance obligations

   2020   2021   2022 and thereafter 
Software license and related revenues and consulting services  $6,632   $1,786   $1,899 
Schedule of trade receivables, contract assets (unbilled receivables) and contract liabilities (deferred revenues) from contracts with customers
   December 31, 
   2019   2018 
         
Trade receivables (net of allowance for doubtful accounts)  $96,694   $90,274 
Deferred revenues  $8,724   $4,857