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
Mar. 31, 2020
Dec. 31, 2019
Prepaid Expense and Other Assets, Current [Abstract]    
Prepaid license $ 1,008 $ 1,209
Spare parts 1,965 1,857
Insurance receivable 874 1,148
Other prepaid expenses and assets 611 733
Total prepaid expenses and other assets $ 4,458 $ 4,947