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Related Parties - Schedule of Related Parties (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Related Party Transactions [Abstract]          
Sales to related parties $ 1,729 $ 1,667 $ 5,713 $ 3,804  
Fees paid to directors and officers 836 833 2,658 2,461  
Payments to other related parties 964 $ 863 2,797 $ 2,525  
Due from VS 5,885   5,885   $ 6,229
Due from other related parties 2,503   2,503   2,010
Due from related parties, current 8,388   8,388   8,239
Due to related parties - current 5,099   5,099   1,500
Due to related parties - long term $ 617   $ 617   $ 600