PROPERTY, PLANT AND EQUIPMENT - Graphite Properties (Details)	3 Months Ended	12 Months Ended
	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) mi² a	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Impairment of uranium properties	$ 5,200,000	$ 5,200,000	$ 143,000
Total mineral property expenses		$ 2,640,000	2,736,000
Coosa Graphite Project
Property, Plant and Equipment [Line Items]
Area of land | a		45,000
Lease term		5 years
Annual rentals due		$ 10,000
Optioned lease lands		$ 16,179,100
Percentage of NSR royalty		2.00%
Gross area on mineral leases | mi²		70.31
Payment at time of completion		$ 100,000
Additional payment, net smelter return royalty		$ 150,000
Coosa Graphite Project | Maximum
Property, Plant and Equipment [Line Items]
Lease term		70 years
Percentage of royalties on lease of sales		0.50%
Maximum net smelter return royalty		$ 150,000
Rosita Project
Property, Plant and Equipment [Line Items]
Impairment of uranium properties		1,161,000
Cebolleta/Juan Tafoya Property
Property, Plant and Equipment [Line Items]
Impairment of uranium properties		3,938,000
Mineral Property
Property, Plant and Equipment [Line Items]
Total mineral property expenses		$ 2,600,000	$ 2,700,000