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CASH, CASH EQUIVALENTS AND RESTRICTED CASH (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Cash and cash equivalents	$ 7,954	$ 46,452
Restricted cash - current (Note 13)	10,193
Restricted cash - non-current (Note 17)	3,595	48
Total cash, cash equivalents, and restricted cash	21,742	$ 46,500	$ 13,074	$ 30,489
Flow Through Common Shares
Restricted cash - current (Note 13)	10,200
Surety Bonds
Restricted cash - current (Note 13)	3,600
Reclamation and Surety Bonds
Restricted cash - current (Note 13)	$ 3,600

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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