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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
Prepaid legal fees $ 172 $ 16
Prepaid income tax 3,014 5,615
Prepaid maintenance agreements 2,017 819
Interest receivable 1,065 1,279
Advance to suppliers 3,877 3,579
Other 4,367 4,289
Total $ 14,512 $ 15,597