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INVESTMENT IN JOINT VENTURE (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Oct. 02, 2018
Investment in joint venture
Investment in joint venture	$ 18.4	$ 18.3
Equity in earnings (losses) of joint ventures, net	0.1	(0.3)
Puren
Investment in joint venture
Investment in joint venture	18.4	18.3
Equity in earnings (losses) of joint ventures, net	$ 0.1	0.1
Bald Mountain Exploration LLC
Investment in joint venture
Equity in earnings (losses) of joint ventures, net		$ (0.4)
Bald Mountain Exploration LLC | KGBM
Investment in joint venture
Percentage of equity interest aquired			50.00%

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The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

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