Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2023

Accounting Policies [Abstract]

Schedule of Cash and Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents, and restricted cash as reported within the Unaudited Condensed Consolidated Balance Sheets to “Cash, cash equivalents, and restricted cash at end of period” as reported within the Unaudited Condensed Consolidated Statements of Cash Flows:

In thousands	June 30, 2023		June 30, 2022
Cash and cash equivalents	$	531	$	517
Restricted cash for future asset retirement obligations	48,405		46,869
Total cash, cash equivalents, and restricted cash shown in the Unaudited Condensed Consolidated Statements of Cash Flows	$	48,936	$	47,386

Schedule of Restricted Cash and Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents, and restricted cash as reported within the Unaudited Condensed Consolidated Balance Sheets to “Cash, cash equivalents, and restricted cash at end of period” as reported within the Unaudited Condensed Consolidated Statements of Cash Flows:

In thousands	June 30, 2023		June 30, 2022
Cash and cash equivalents	$	531	$	517
Restricted cash for future asset retirement obligations	48,405		46,869
Total cash, cash equivalents, and restricted cash shown in the Unaudited Condensed Consolidated Statements of Cash Flows	$	48,936	$	47,386

Schedule of Net Loss Per Share, Basic and Diluted

The following table sets forth the weighted average shares used for purposes of calculating basic and diluted net income per common share for the periods indicated:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
In thousands	2023	2022	2023	2022
Weighted average common shares outstanding – basic	51,817	51,757	51,661	51,680
Effect of potentially dilutive securities
Restricted stock, restricted stock units and performance stock units	475	603	418	591
Warrants	1,706	2,526	1,802	2,660
Employee Stock Purchase Plan	1	—	1	—
Weighted average common shares outstanding – diluted	53,999	54,886	53,882	54,931

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following outstanding securities were excluded from the computation of diluted net income per share for the six months ended June 30, 2023 and June 30, 2022, as their effect would have been antidilutive, as of the respective dates:

	June 30,
In thousands	2023	2022
Restricted stock, restricted stock units and performance stock units (1)	5	191

(1)    Antidilutive shares for the six-month periods ended June 30, 2023 and 2022 reflect total shares excluded from the computation of diluted net income per share that are potentially dilutive in the future, assuming performance stock units at the target level. Shares disclosed for the period ended June 30, 2022 have been revised to be consistent with the current year presentation.