Annual report pursuant to Section 13 and 15(d)

PREPAID EXPENSES AND OTHER ASSETS (Details)

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PREPAID EXPENSES AND OTHER ASSETS (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Prepaid Expense and Other Assets, Current [Abstract]    
Prepaid license $ 1,209 $ 2,419
Spare parts 1,857 1,597
Insurance receivable 1,148 0
Other prepaid expenses and assets 733 648
Total $ 4,947 $ 4,664