Quarterly report pursuant to Section 13 or 15(d)

PREPAID EXPENSES AND OTHER ASSETS (Details)

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PREPAID EXPENSES AND OTHER ASSETS (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Prepaid Expense and Other Assets, Current [Abstract]    
Prepaid license $ 806 $ 1,209
Spare parts 2,049 1,857
Insurance receivable 0 1,148
Other prepaid expenses and assets 378 733
Total prepaid expenses and other assets $ 3,233 $ 4,947