Supplemental Cash Flow Information (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2021

Dec. 31, 2020

Supplemental Cash Flow Information [Abstract]

Schedule of supplemental cash flow information

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

	Three Months Ended March 31,
	2021		2020
Cash paid for interest	$	—	$	3,313
Significant non-cash financing and investing activities:
Increase in debt from in-kind interest	3,671		16,420
Plant, equipment, and mine development additions included in accounts payable	911		364
Plant, equipment, and mine development acquired by note payable	407		—
Vesting of restricted stock units	115		—
Accrual of deferred financing and equity issuance costs	—		382

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

	Year Ended December 31,
	2020		2019
Cash paid for interest	$	5,366	$	10,239
Significant non-cash financing and investing activities:
Exchange of Seller's 1.5 Lien Notes for HYMC common stock	160,254		—
Exchange of Seller's 1.25 Lien Notes for Subordinated Notes	80,000		—
Exchange of Seller's 1.25 Lien Notes for HYMC common stock	48,459		—
Write-off of Seller's debt issuance costs	8,202		—
Plant, equipment, and mine development additions included in accounts payable	1,229		2,458
Private Warrants transferred to Public Warrants	581		—
Accrual of deferred financing and equity issuance costs	94		1,025