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Contingencies and Commitments (Tables) | 12 Months Ended
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Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract] |
Undiscounted reserve | The undiscounted reserve balance at the beginning of the year, the amounts expensed and paid, and the balance at December 31, 2022 and 2021 are as follows:
(Thousands) |  | 2022 |  | 2021
Reserve balance at beginning of year |  | $ | 4,770 |  |  | $ | 5,476 |
Expensed |  | 180 |  |  | 185 |
Paid |  | (480) |  |  | (891) |
Reserve balance at end of year |  | $ | 4,470 |  |  | $ | 4,770 |
Ending balance recorded in: |  |  |  |
Other liabilities and accrued items |  | $ | 440 |  |  | $ | 539 |
Other long-term liabilities |  | 4,030 |  |  | 4,231 |
Schedule of asset retirement obligations | Asset Retirement Obligations The Company has asset retirement obligations related to its mine in Utah, as well as for certain leased facilities where the Company is contractually obligated to restore the facility back to its original condition at the end of the lease. The following represents a roll forward of the Company's asset retirement obligation liabilities for the years ended December 31, 2022 and 2021:
(Thousands) |  | 2022 |  | 2021
Asset retirement obligation at beginning of period |  | $ | 2,231 |  |  | $ | 1,765 |
Accretion expense |  | 198 |  |  | 134 |
Change in liability |  | — |  |  | 332 |
Asset retirement obligation at end of period |  | $ | 2,429 |  |  | $ | 2,231 |

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