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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]    
Prepaid legal fees $ 589 $ 16
Prepaid income tax 1,440 5,615
Prepaid maintenance agreements 1,729 819
Interest receivable 1,395 1,279
Advance to suppliers 4,297 3,579
Other 5,305 4,289
Total $ 14,755 $ 15,597