FEDERAL INCOME TAXES - Schedule of Reconciliation of Expected Income Tax on Net Income at Statutory Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2018	Dec. 31, 2017
FEDERAL INCOME TAXES.
Net loss	$ (11,121)	$ (16,144)
Statutory tax rate	21.00%	21.00%	21.00%	35.00%
Tax recovery at statutory rate	$ (2,335)	$ (3,390)
State tax rate	(672)	(1,173)
Foreign tax rate	(1)	(2)
Change in U.S. tax rates	(32)	(759)
Other adjustments	180	97
Operating loss carryforward adjustment	685	(1,409)
Operating loss Section 382 adjustment	110	(7)
Nondeductible expenses and other permanent items	19	(78)
Sale of Uranium Entities		(799)
Change in valuation allowance	$ 2,046	7,520
Income tax expense (recovery)