LIQUIDITY (Details) - USD ($) $ in Thousands, shares in Millions		1 Months Ended		3 Months Ended		9 Months Ended
	Sep. 01, 2020	Oct. 31, 2020	Aug. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Capital expenditures to commercial plants				$ 120,000		$ 120,000
Asset retirement obligations				5,969		5,969		$ 6,300	$ 6,203
Exploration and evaluation costs, amounts spent				12	$ 12	18	$ 77
Cash balances				5,480	$ 716	5,480	716	$ 1,870
Issuance of common stock, net						13,530	$ 2,628
Subsequent Event
Cash balances		$ 53,300
Issuance of common stock, net		50,200
Uranium plant | Texas
Amount of expenditures						3,500
Reclamation performance obligation bonds				9,300		9,300
Asset retirement obligations				$ 6,000		$ 6,000
Uranium plant | Texas | Minimum
Term of reclamation activities						4 years
Uranium plant | Texas | Maximum
Term of reclamation activities						5 years
Uranium plant | Mexico | Minimum
Exploration and evaluation costs, amounts spent						$ 500
Uranium plant | Mexico | Maximum
Exploration and evaluation costs, amounts spent						$ 1,000
Controlled Equity Offering Sales Agreement and Purchase Agreement | Subsequent Event
Issuance of common stock, net		50,200
Lithium Holdings In Utah And Nevada
Annual rentals due			$ 200
Cantor and Lincoln Park | Controlled Equity Offering Sales Agreement and Purchase Agreement | Subsequent Event
Cash balances		$ 53,300
Number of common stock issued		8.5
EnCore Energy Corp | Letter of Intent (LOI)
Elimination of bonding liability	$ 9,300
Elimination of assets retirement obligation	6,000
Elimination of reclamation and compliance costs	4,000
Pending sale, Common stock received	$ 2,000