Quarterly report pursuant to Section 13 or 15(d)

SHORT TERM INVESTMENTS, PREPAID EXPENSES AND OTHER CURRENT ASSETS - Schedule of Prepaid Expenses (Details)

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SHORT TERM INVESTMENTS, PREPAID EXPENSES AND OTHER CURRENT ASSETS - Schedule of Prepaid Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Prepaid income tax $ 1,425 $ 5,429
Other prepaid expenses and other current assets 509 1,151
Total $ 1,934 $ 6,580