Other Assets

12 Months Ended

Dec. 31, 2021

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

Other Assets

Other Assets

Components of other assets were as follows at the dates indicated (in thousands):

	December 31,
	2021		2020
Amounts associated with liability insurance program:
Insurance collateral deposits	$	721	$	714
Excess loss fund	622		617
Accumulated interest income	489		449
Other amounts:
State collateral deposits	36		31
Materials and supplies	574		488
Debt issuance costs	292		—
Other	293		84
Total other assets	$	3,027	$	2,383

We have established certain deposits to support participation in our liability insurance program and remittance of state crude oil severance taxes and other state collateral deposits. Insurance collateral deposits are held by the insurance company to cover past or potential open claims based upon a percentage of the maximum assessment under our insurance policies. Insurance collateral deposits are invested at the discretion of our insurance carrier. Excess amounts in our loss fund represent premium payments in excess of claims incurred to date that we may be entitled to recover through settlement or commutation as claim periods are closed. Interest income is earned on the majority of amounts held by the insurance companies and will be paid to us upon settlement of policy years.