Intangible Assets
We have a coal supply agreement intangible asset which is subject to amortization based on units of production over the term of the lignite sales agreement which expires in 2032. The gross and net balances are set forth in the following table:
 Gross Carrying
Amount
Accumulated
Amortization and Impairment
Net
Balance
Balance at December 31, 2025   
Coal supply agreement$84,200 $(79,475)$4,725 
Balance at December 31, 2024   
Coal supply agreement$84,200 $(78,725)$5,475 
Amortization expense for intangible assets was $0.8 million and $0.5 million in 2025 and 2024, respectively.

Historical Timeline

Fiscal YearFiled
2025Mar 4, 2026Showing above
2024Mar 5, 2025
2023Mar 6, 2024
2022Mar 15, 2023
2021Mar 2, 2022
2020Mar 3, 2021
2019Mar 4, 2020
2018Mar 6, 2019
2017Mar 7, 2018
2016Mar 1, 2017
2015Mar 2, 2016

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.