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Investment in Associate (Details) - PTW
1 Months Ended 12 Months Ended
Apr. 23, 2018
Dec. 31, 2019
Dec. 31, 2018
Apr. 30, 2019
Investment in Associate (Textual)        
Company Ownership 49.00%   49.00% 49.00%
Option to Purchase Equity, Description An additional 31% equity interest at a later date. 31% in WIP. A 31% unexercised option in WIP as at December 31, 2018. Due to the continuing legal restructuring in Indonesia, all the conditions precedent had not been satisfied and the 31% option had not been exercised.