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, 2016
Dec. 31, 2015
PREPAID EXPENSES AND OTHER ASSETS [Abstract]    
Prepaid license $ 1,919 $ 0
Prepaid catalyst 187 455
Prepaid insurance 797 1,182
Other prepaid expenses and assets 608 755
Total $ 3,511 $ 2,392