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Supplemental Financial Information (Tables)

6 Months Ended

Jun. 30, 2023

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of Other Long Term Assets

The following table summarizes the components of Other long-term assets, net as presented in the Condensed Consolidated Balance Sheets:

						As of
(in thousands)						June 30, 2023						December 31, 2022
Other long-term assets, net:
Right of use assets, operating leases, net						$	11,292					$	7,734
Intangible assets, net						8,222						847
Spare parts, net						7,647						6,789
Upfront Customer Consideration						6,221						6,475
Mine development costs, net						6,629						5,478
Mine reclamation asset, net						1,591						1,641
Other						2,622						1,683
Total other long-term assets, net						$	44,224					$	30,647

Schedule of Other Liabilities

The following table details the components of Other current liabilities and Other long-term liabilities as presented in the Condensed Consolidated Balance Sheets:

						As of
(in thousands)						June 30, 2023						December 31, 2022
Other current liabilities:
Current portion of operating lease obligations						$	2,375					$	2,724
Income and other taxes payable						1,069						1,039
Current portion of mine reclamation liability						169						548
Other(1)						2,762						2,334
Total other current liabilities						$	6,375					$	6,645
Other long-term liabilities:
Operating lease obligations, long-term						$	9,006					$	5,133
Mine reclamation liabilities						5,323						7,985
Other						806						733
Total other long-term liabilities						$	15,135					$	13,851

(1) Included in Other current liabilities is $1.7 million related to the Repayment Agreement as defined in Note 10.

Schedule of Change in Asset Retirement Obligation

The Mine reclamation liabilities represent AROs and changes for the six months ended June 30, 2023 and year ended December 31, 2022 were as follows:

						As of
(in thousands)						June 30, 2023						December 31, 2022
Asset retirement obligations, beginning of period						$	8,533					$	9,959
Asset retirement obligations assumed(1)						1,500						—
Accretion						303						611
Liabilities settled(2)						(4,844)						(2,071)
Changes due to scope and timing of reclamation						—						34
Asset retirement obligations, end of period						5,492						8,533
Less current portion						169						548
Asset retirement obligations, long-term						$	5,323					$	7,985

(1) Represents the Corbin ARO and Mine 4 ARO in the amounts of $0.5 million and $1.0 million, respectively.

(2) Represents the removal of the Marshall Mine ARO as a result of the MM Transaction as further discussed in Note 3.

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- References

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- Definition

Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.

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Tabular disclosure of other liabilities.

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- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481850/410-20-50-1

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