Supplemental Disclosures to the Balance Sheets and Statements of Cash Flows

12 Months Ended

Dec. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Disclosures to the Balance Sheets and Statements of Cash Flows

Other current assets reported on the consolidated balance sheets included the following:


	Year Ended December 31,
	2021		2020
	(in thousands)
Prepaid expenses	$	26,840	$	3,580

Materials and supplies	9,533		11,666
Prepaid deposits	6,415		12
Oil inventories	2,933		3,490
Other	225		652
Total other current assets	$	45,946	$	19,400

Other non-current assets at December 31, 2021 and December 31, 2020 included approximately $5 million and $7 million of deferred financing costs, net of amortization, respectively. During the year ended December 31, 2021 the allowance for doubtful accounts decreased by approximately $1.3 million, which represented collection of past due amounts and the reversal of that portion of the allowance to the consolidated statements of operations.

Accounts payable and accrued expenses on the consolidated balance sheets included the following:


	Year Ended December 31,
	2021		2020
	(in thousands)
Accounts payable - trade	$	17,699	$	11,055
Accrued expenses	62,962		43,452
Royalties payable	24,816		15,150

Greenhouse gas liability - current portion	7,513		35,554
Taxes other than income tax liability	8,273		10,118
Accrued interest	10,736		10,783
Dividends payable	4,800		—
Asset retirement obligation - current portion	20,000		25,000
Other	725		873
Total accounts payable and accrued expenses	$	157,524	$	151,985

At December 31, 2021 other non-current liabilities included approximately $18 million non-current greenhouse gas liability, which is due 2024. At December 31, 2020 we had no non-current greenhouse gas liability as the entire amount was due in 2021 and thus classified as a current liability in accounts payable and accrued expenses.

Supplemental Information on the Statement of Operations

For the years ended December 31, 2021, 2020, and 2019 other operating expenses were $3 million, $6 million, and $5 million respectively. For the year ended December 31, 2021, other operating expenses mainly consisted of expensing $3 million of unamortized debt issuance costs related to the 2017 RBL facility, approximately $3 million of supplemental property tax assessments, royalty audit charges and tank rental costs, and $2 million of various other costs such as excess abandonment costs and legal fees, partially offset by approximately $2 million of gain on the sale of properties and over $2 million of income from employee retention credits. For the year ended December 31, 2020, other operating expenses included of $3 million of excess abandonment costs, $2 million of oil tank storage fees, and $1 million of drilling rig standby charges. For the year ended December 31, 2019 other operating income was $5 million, which mainly consisted of the costs in excess of the liability, due to earlier than anticipated abandonment and spending, related to our long-term abandonment activities and obligation.

Supplemental Cash Flow Information

Supplemental disclosures to the consolidated statements of cash flows are presented below:


	Year Ended December 31,
	2021		2020		2019
	(in thousands)
Supplemental Disclosures of Significant Non-Cash Operating Activities:
Greenhouse gas liability - reclassification from long-term to current liability	$	—	$	33,376	$	—
Supplemental Disclosures of Significant Non-Cash Investing Activities:
Material inventory transfers to oil and natural gas properties	$	3,424	$	1,596	$	10,056
Supplemental Disclosures of Cash Payments (Receipts):
Interest, net of amounts capitalized	$	29,211	$	29,962	$	30,720
Income taxes payments (refunds)	$	699	$	222	$	(2)

Cash and cash equivalents consists primarily of highly liquid investments with original maturities of three months or less and are stated at cost, which approximates fair value. As part of our cash management system, we use a controlled disbursement account to fund cash distribution checks presented for payment by the holder. Checks issued but not yet presented to banks may result in overdraft balances for accounting purposes, and if so, are included in accounts payable and accrued expenses in the consolidated balance sheets. Such amounts are immaterial as of December 31, 2021 and December 31, 2020.