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Related Party Transactions (Tables)
9 Months Ended
Sep. 30, 2018
Related Party Transactions [Abstract]  
Schedule of related party transactions
  

Three Months Ended

September 30,

  

Nine Months Ended

September 30,

 
  2018  2017  2018  2017 
  (in thousands) 
Amount IDT charged the Company $224  $313  $920  $1,203 
Amount the Company charged IDT $73  $116  $302  $346 
Amount Rafael charged the Company $53  $  $107  $ 
Schedule of receivables and payables
  September 30,
2018
  December 31,
2017
 
  (in thousands) 
Due to IDT $142  $360 
Due from IDT  52   132 
Due to Rafael