Quarterly report pursuant to Section 13 or 15(d)

PREPAID EXPENSES AND OTHER ASSETS (Details)

v3.19.1
PREPAID EXPENSES AND OTHER ASSETS (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Prepaid Expense and Other Assets, Current [Abstract]    
Prepaid license $ 1,814 $ 2,419
Spare parts 1,621 1,597
Other prepaid expenses and assets 1,100 648
Total $ 4,535 $ 4,664