Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2021

Supplemental Cash Flow Information [Abstract]

Schedule of supplemental cash flow information

The following table provides supplemental cash flow information (dollars in thousands):

	Nine Months Ended September 30,
	2021		2020
Cash interest paid	$	2,153	$	5,366
Significant non-cash financing and investing activities:
Increase in debt from in-kind interest	13,696		—
Plant, equipment, and mine development acquired by note payable	538		—
Plant, equipment, and mine development additions included in accounts payable	424		3,713
Liability based restricted stock units transferred to equity	754		—
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