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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2022

Schedule of Property, Plant and Equipment Useful Lives


Buildings			12 - 15 years
Storage tanks			15 years
Shop tools and equipment			3 - 5 years
Mining equipment			5 years
Office equipment			4 - 5 years
Furniture and fixtures			5 - 7 years
Light trucks and utility vehicles			5 years

The following is a summary of property, plant and equipment:


	December 31, 2022						December 31, 2021
	Cost		Accumulated Depreciation		Net Book Value		Cost		Accumulated Depreciation		Net Book Value
Property, plant and equipment
Nichols Ranch	$	29,210	$	(20,221)	$	8,989	$	29,210	$	(18,185)	$	11,025
Alta Mesa (1)	—		—		—		13,626		(4,996)		8,630
Equipment and other	16,626		(12,953)		3,673		15,079		(12,751)		2,328
Property, plant and equipment total	$	45,836	$	(33,174)	$	12,662	$	57,915	$	(35,932)	$	21,983

(1) As of December 31, 2022, the net book value of Alta Mesa is $8.21 million, which is included in Property, plant and equipment and other assets held for sale, net on the Consolidated Balance Sheet.