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Supplemental Cash Flow Information
 9 Months Ended
Sep. 30, 2022
Supplemental Cash Flow Information [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
The following table provides supplemental cash flow information (dollars in thousands):
Nine Months Ended September 30,
20222021
Cash interest paid$3,858 $2,153 
Significant non-cash financing and investing activities:
Increase in debt from in-kind interest7,279 13,696 
Debt issuance costs paid in-kind3,300 — 
Liability based restricted stock units transferred to equity - Note 16727 754 
Stock issuance - other - Note 141,908 — 
Mobile equipment acquired by note payable— 538 
Plant, equipment, and mine development additions included in accounts payable— 424