PROPERTY, PLANT AND EQUIPMENT - Net Book Value of Property, Plant and Equipment (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Oct. 31, 2021 building	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		$ 14,479	$ 8,985
Number of buildings acquired | building	2
Mineral rights and properties
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		8,972	8,972
Other property, plant and equipment
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		4,490	13
Increase in other property, plant and equipment		4,500
Construction in progress
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		1,017
Construction in progress | Coosa Plant - Phase 1
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		1,000
Alabama
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		14,451	8,972
Alabama | Mineral rights and properties
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		8,972	8,972
Alabama | Other property, plant and equipment
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		4,462
Alabama | Construction in progress
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		1,017
Corporate
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		28	13
Corporate | Other property, plant and equipment
Property, Plant and Equipment [Line Items]
Total Property, Plant and Equipment		$ 28	$ 13