STOCK-BASED COMPENSATION - Compensation Expense (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation	$ 1,591,231	$ 611,808	$ 2,356,086	$ 1,018,296
Stock-based compensation forfeitures	0	0	(850,763)	0
Stock-based compensation, net of forfeitures	1,591,231	611,808	1,505,323	1,018,296
Stock-based compensation (income) expense	1,510,671	611,808	1,382,905	1,018,296
Capitalized stock-based compensation	80,560	0	122,418	0
Stock-based compensation, net of forfeitures	1,591,231	611,808	1,505,323	1,018,296
Exploration and mine development costs
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation (income) expense	219,939	262,794	2,000	393,941
General and administrative expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation (income) expense	$ 1,290,732	$ 349,014	$ 1,380,905	$ 624,355

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

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