PROPERTIES, PLANTS AND EQUIPMENT (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Plant and equipment	$ 15,707,926	$ 15,626,202
Buildings	1,950,251	1,843,433
Mineral rights and interests	848,012	848,012
Land &amp; other	4,926,184	4,926,184
Total	23,432,373	23,243,831
Accumulated depreciation	(12,330,249)	(12,110,098)
Properties, plants and equipment, net	11,102,124	11,133,733
Antimony Segment USAC
Plant and equipment	1,713,328	1,684,977
Buildings	243,248	243,248
Mineral rights and interests	0	0
Land &amp; other	2,431,387	2,431,387
Total	4,387,963	4,359,612
Accumulated depreciation	(2,742,278)	(2,732,809)
Properties, plants and equipment, net	1,645,685	1,626,803
Antimony Segment USAMSA
Plant and equipment	8,774,212	8,757,775
Buildings	613,449	613,449
Mineral rights and interests	848,012	848,012
Land &amp; other	2,478,044	2,478,044
Total	12,713,717	12,697,280
Accumulated depreciation	(5,761,012)	(5,622,555)
Properties, plants and equipment, net	6,952,705	7,074,725
Zeolite Segment BRZ
Plant and equipment	3,881,612	3,853,056
Buildings	1,093,554	986,736
Mineral rights and interests	0	0
Land &amp; other	16,753	16,753
Total	4,991,919	4,856,545
Accumulated depreciation	(3,359,362)	(3,314,658)
Properties, plants and equipment, net	1,632,557	1,541,887
Precious Metals Segment
Plant and equipment	1,338,774	1,330,394
Buildings	0	0
Mineral rights and interests	0	0
Land &amp; other	0	0
Total	1,338,774	1,330,394
Accumulated depreciation	(467,597)	(440,076)
Properties, plants and equipment, net	$ 871,177	$ 890,318

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Carrying amount at the balance sheet date of mineral rights, or rights to extract a mineral from the earth or to receive payment in the form of a royalty for the extraction of minerals, net of amortization.

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