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RELATED PARTY TRANSACTIONS AND BALANCES (Details 2) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of transactions between related parties [line items]      
Salaries and benefits $ 723 $ 956 $ 860
Office and miscellaneous 286 359 464
Exploration and evaluation assets 5,723 5,361 5,527
Oniva International Services Corp. [Member]      
Disclosure of transactions between related parties [line items]      
Salaries and benefits 665 594 450
Office and miscellaneous 322 560 567
Exploration and evaluation assets 206 353 352
Total cost $ 1,193 $ 1,507 $ 1,369