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


	As of
(in thousands)	June 30, 2026		December 31, 2025 As Adjusted (1)








Prepaid expenses and other current assets:
Prepaid expenses	$	3,617	$	2,959
Prepaid lender fees, net (2)	1,418		1,472
Prepaid taxes and tax refunds	143		147
Other	1,716		1,826
Total prepaid expenses and other current assets	$	6,894	$	6,404

Other long-term assets, net:
Spare parts, net	$	11,015	$	11,017
Mine development costs, net	6,618		6,763
Right of use assets, operating leases, net	5,412		6,793
Upfront Customer Consideration (3)	5,279		5,639
Deferred plant turnaround costs, net (4)	2,369		394
Mine reclamation asset, net	1,581		1,645
Intangible assets, net	572		570
Other	2,654		2,680

Total other long-term assets, net	$	35,500	$	35,501

(1) Adjusted to reflect the retrospective change in accounting method for planned major maintenance costs as described in Note 1. See Note 12 for reconciliation to previously reported amounts.

(2) Represents legal and administrative costs incurred to obtain the Revolving Credit Facility. This asset is being amortized on a straight-line basis over the five-year contractual period of the Revolving Credit Facility.

(3) Represents remaining balance on consideration paid to a customer under a long-term supply contract executed in 2020. This asset is being amortized as a reduction to revenue on a straight-line basis over the expected 15-year contractual period of the contract.

(4) Represents costs incurred in connection with planned major maintenance activities, which currently includes maintenance materials, parts and direct labor directly attributable to the Company's plant turnaround in April 2026 for the period ended June 30, 2026, and the trailing deferred plant turnaround costs, net directly attributable to the Company's plant turnaround in April 2024 for the period ended December 31, 2025 (as adjusted). This asset is being amortized on a straight-line basis over the expected two-year period until the Company's next planned turnaround event.

Mine development costs include acquisition costs, the cost of other development work and mitigation costs related to the Five Forks Mine and are depleted over the estimated life of the related mine reserves.

Mine reclamation asset, net represents an asset retirement obligation ("ARO") asset related to the Five Forks Mine and is depreciated over its estimated life.

As of June 30, 2026 and December 31, 2025, Other includes the Highview Investment in the amount of $0.6 million that is carried at cost, less impairment, plus or minus observable changes in price for identical or similar investments of the same issuer.

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, 2026		December 31, 2025
Other current liabilities:
Current portion of operating lease obligations	$	2,654	$	2,842
Sales, use and other taxes payable	1,282		1,304
Current portion of mine reclamation liability	1,037		1,037



Other	3,095		1,832
Total other current liabilities	$	8,068	$	7,015

Other long-term liabilities:
Mine reclamation liabilities	$	5,901	$	5,719
Operating lease obligations, long-term	4,705		6,086



Other	—		63
Total other long-term liabilities	$	10,606	$	11,868


	As of
(in thousands)	June 30, 2026		December 31, 2025
Asset retirement obligations, beginning of period	$	6,756	$	6,279

Accretion	280		513
Liabilities settled	(98)		(177)
Changes due to scope and timing of reclamation	—		141
Asset retirement obligations, end of period	6,938		6,756
Less current portion	1,037		1,037
Asset retirement obligations, long-term	$	5,901	$	5,719

As of June 30, 2026 and December 31, 2025, the Company's ownership interest in Tinuum Group, an equity method investment, was 42.5%. For the three and six months ended June 30, 2026, the Company recognized earnings from Tinuum Group of zero and $0.1 million, respectively, in Other income. For the three and six months ended June 30, 2025, the Company recognized earnings from Tinuum Group of zero and $0.2 million, respectively. These amounts are presented as a component of Other income on the Condensed Consolidated Statements of Operations. In 2026, Tinuum Group, LLC has continued to wind down its operations.

For the three and six months ended June 30, 2026, the Company recognized expense of zero and $0.2 million, respectively, in Cost of revenue, exclusive of depreciation and amortization, related to royalties owed to Tinuum Group under an agreement for certain of the Company's sales of M-ProveTM products. Comparatively, for the three and six months ended June 30, 2025, the Company recognized expense of $0.2 million and $0.2 million, respectively, in Cost of revenue, exclusive of depreciation and amortization, related to these royalties.