STOCK-BASED COMPENSATION - Compensation Expense (Details) - USD ($)	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 764,855	$ 406,488
Stock-based compensation forfeitures	(850,763)	0
Stock-based compensation, net of forfeitures	(85,908)	406,488
Stock-based compensation (income) expense	(127,766)	406,488
Capitalized stock-based compensation	41,858	0
Stock-based compensation, net of forfeitures	(85,908)	406,488
Exploration and mine development costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation (income) expense	(217,939)	131,147
General and administrative expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation (income) expense	$ 90,173	$ 275,341

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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