Contingencies and Commitments (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021 and 2020 are as follows:

(Thousands)	2021		2020
Reserve balance at beginning of year	$	5,476	$	5,937
Expensed	185		288
Paid	(891)		(749)
Reserve balance at end of year	$	4,770	$	5,476
Ending balance recorded in:
Other liabilities and accrued items	$	539	$	845
Other long-term liabilities	4,231		4,631

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, 2021 and 2020:

(Thousands)	2021		2020
Asset retirement obligation at beginning of period	$	1,765	$	1,421
Accretion expense	134		137
Change in liability	332		207
Asset retirement obligation at end of period	$	2,231	$	1,765