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CASH AND CASH EQUIVALENTS (Tables)
12 Months Ended
Dec. 31, 2018
Cash And Cash Equivalents  
Cash and cash equivalent balance
    At December 31   At December 31   At January 1
(in thousands)   2018   2017   2017
             
Cash $ 1,152 $ 2,717 $ 6,927
Cash in MLJV and MWJV   654   913   1,557
Cash equivalents   21,401   6   7,410
  $ 23,207 $ 3,636 $ 15,894