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COMPONENTS OF THE COMPANY'S CONDENSED CONSOLIDATED BALANCE SHEETS Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Balance Sheet Related Disclosures [Abstract] |  |
Prepaid legal fees | $ 157 | $ 16
Prepaid income tax | 6,230 | 5,615
Prepaid maintenance agreements | 1,318 | 819
Interest receivable | 1,712 | 1,279
Advance to suppliers | 4,204 | 3,579
Other | 6,949 | 4,289
Total | $ 20,570 | $ 15,597

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