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Assets Held For Sale
 3 Months Ended
Mar. 31, 2022
Asset Retirement Obligation Disclosure [Abstract]  
Assets Held For Sale Assets Held For Sale
The following table summarizes the Company's Assets held for sale by asset class as of March 31, 2022 and December 31, 2021 (dollars in thousands):
March 31,
2022		December 31,
2021
Equipment not in use$9,913 $11,163 
Mine equipment125 125 
Materials and supplies270 270 
Total$10,308 $11,558 
The Assets held for sale are being marketed for sale and the Company has received interest from potential purchasers. It is the Company's intention to complete the sales of these assets within the upcoming year. During the three months ended March 31, 2022, the Company sold a regrind mill included in equipment not in use for gross proceeds of $1.3 million.