Marshall Mine (Tables)

9 Months Ended

Sep. 30, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Assets and Liabilities

The following tables summarize the assets and liabilities of Marshall Mine, LLC and their classification in the Company's Condensed Consolidated Balance Sheets:

(in thousands)	September 30, 2022		December 31, 2021		Balance sheet component
Cash	$	—	$	914	Current assets
Norit receivable, short-term	—		2,056		Current assets
Restricted cash	10,000		10,027		Non-current assets
Property and equipment, net	—		1,968		Non-current assets
Norit receivable, long-term	—		6,846		Non-current assets
	$	10,000	$	21,811
Accounts payable and accrued liabilities	$	525	$	1,065	Current liabilities
Asset retirement obligation, short-term	418		1,775		Current liabilities
Asset retirement obligation, long-term	4,180		4,546		Non-current liabilities
	$	5,123	$	7,386