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DEFERRED REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2019
Deferred Revenue Tables Abstract |
Deferred revenue |
|  |  |  | At December 31 |  | At December 31
(in thousands) |  |  |  | 2019 |  | 2018
Deferred revenue – pre-sold toll milling: |  |  |  |  |  |
CLJV Toll Milling - APG |  |  | $ | 36,321 | $ | 37,727
|  |  | $ | 36,321 | $ | 37,727
Deferred revenue-by balance sheet presentation: |  |  |  |
Current |  |  | $ | 4,580 | $ | 4,567
Non-current |  |  |  | 31,741 |  | 33,160
|  |  | $ | 36,321 | $ | 37,727
Deferred revenue liability continuity |
(in thousands) |  |  |  | 2019 |  | 2018
Balance-January 1 |  |  | $ | 37,727 | $ | 38,652
Revenue earned during the period (note 23) |  |  |  | (4,609) |  | (4,239)
Accretion |  |  |  | 3,203 |  | 3,314
Balance-December 31 |  |  | $ | 36,321 | $ | 37,727

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