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Supplemental Cash Flow Information (Tables)
6 Months Ended
Jun. 30, 2021
Supplemental Cash Flow Information [Abstract]  
Schedule of supplemental cash flow information
The following table provides supplemental cash flow information (dollars in thousands):
Six Months Ended June 30,
20212020
Cash interest paid$532 $5,366 
Significant non-cash financing and investing activities:
Increase in debt from in-kind interest6,914 
Plant, equipment, and mine development acquired by note payable407 — 
Plant, equipment, and mine development additions included in accounts payable329 3,038 
Liability based restricted stock units transferred to equity284 — 
Exchange of Seller lien notes for HYMC common stock— 208,713 
Exchange of Seller lien notes for Subordinated Notes— 80,000 
Allocate and write-off Seller's debt issuance costs— 8,202