Northern Oil and Gas (NOG) 10-Q 7 May 21 2021 Q1 Quarterly report Financial data

COVER PAGE

COVER PAGE - shares	3 Months Ended
	Mar. 31, 2021	May 03, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	001-33999
Entity Registrant Name	NORTHERN OIL AND GAS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-3848122
Entity Address, Address Line One	601 Carlson Pkwy – Suite 990
Entity Address, City or Town	Minnetonka
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55305
City Area Code	952
Local Phone Number	476-9800
Title of 12(b) Security	Common Stock, par value $0.001
Trading Symbol	NOG
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		60,402,965
Document Fiscal Period Focus	Q1
Amendment Flag	false
Document Fiscal Year Focus	2021
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001104485

CONDENSED BALANCE SHEETS

CONDENSED BALANCE SHEETS - USD ($) $ in Thousands		Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and Cash Equivalents		$ 2,729	$ 1,428
Accounts Receivable, Net		94,804	71,015
Advances to Operators		431	476
Prepaid Expenses and Other		2,455	1,420
Derivative Instruments		2,005	51,290
Total Current Assets		102,424	125,629
Oil and Natural Gas Properties, Full Cost Method of Accounting
Proved		4,431,977	4,393,533
Unproved		9,621	10,031
Other Property and Equipment		2,502	2,451
Total Property and Equipment		4,444,100	4,406,015
Less – Accumulated Depreciation, Depletion and Impairment		(3,701,715)	(3,670,811)
Total Property and Equipment, Net		742,385	735,204
Derivative Instruments		356	111
Acquisition Deposit		17,500	0
Other Noncurrent Assets, Net		10,578	11,145
Total Assets		873,243	872,089
Current Liabilities:
Accounts Payable		40,788	35,803
Accrued Liabilities		72,667	68,673
Accrued Interest		5,769	8,341
Derivative Instruments		35,108	3,078
Contingent Consideration		618	493
Current Portion of Long-term Debt		0	65,000
Other Current Liabilities		1,018	1,087
Total Current Liabilities		155,968	182,475
Long-term Debt		817,061	879,843
Derivative Instruments		61,987	14,659
Asset Retirement Obligations		18,884	18,366
Other Noncurrent Liabilities		26	50
Total Liabilities		1,053,926	1,095,393
COMMITMENTS AND CONTINGENCIES
Stockholders’ Equity (Deficit)
Preferred Stock, Par Value $.001; 5,000,000 Shares Authorized; 2,218,732 Series A Shares Outstanding at 3/31/2021 2,218,732 Series A Shares Outstanding at 12/31/2020		2	2
Common Stock, Par Value $.001; 135,000,000* Shares Authorized; 60,361,547* Shares Outstanding at 3/31/2021 45,908,779* Shares Outstanding at 12/31/2020	[1]	462	448
Additional Paid-In Capital		1,689,567	1,556,602
Retained Deficit		(1,870,714)	(1,780,356)
Total Stockholders’ Equity (Deficit)		(180,682)	(223,304)
Total Liabilities and Stockholders’ Equity (Deficit)		$ 873,243	$ 872,089
[1]	Adjusted for the 1-for-10 reverse stock split.

CONDENSED BALANCE SHEETS (Paren

CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2021		Dec. 31, 2020		Sep. 18, 2020	Sep. 17, 2020
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001		$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000		5,000,000
Preferred stock, shares outstanding (in shares)	2,218,732		2,218,732
Common stock, par value (in dollars per share)	$ 0.001	[1]	$ 0.001	[1]		$ 0.001
Common stock, shares authorized (in shares)	135,000,000	[1]	135,000,000	[1]	135,000,000
Common stock, shares outstanding (in shares)	60,361,547	[1]	45,908,779	[1]	44,663,990
[1]	Adjusted for the 1-for-10 reverse stock split.

CONDENSED STATEMENTS OF OPERATI

CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues
Gain (Loss) on Commodity Derivatives, Net		$ (135,935)	$ 376,581
Total Revenues		21,397	506,785
Operating Expenses
Production Expenses		34,312	37,335
Production Taxes		13,453	11,896
General and Administrative Expense		6,782	4,871
Depletion, Depreciation, Amortization and Accretion		31,221	61,809
Total Operating Expenses		85,768	115,911
Income (Loss) From Operations		(64,371)	390,875
Other Income (Expense)
Interest Expense, Net of Capitalization		(13,510)	(16,551)
Gain (Loss) on Unsettled Interest Rate Derivatives, Net		240	(677)
Loss on Extinguishment of Debt, Net		(12,594)	(5,527)
Contingent Consideration Loss		(125)	0
Other Income (Expense)		3	0
Total Other Income (Expense)		(25,986)	(22,755)
Income (Loss) Before Income Taxes		(90,357)	368,120
Income Tax Provision (Benefit)		0	(166)
Net Income (Loss)		(90,357)	368,286
Cumulative Preferred Stock Dividend		(3,830)	(3,729)
Net Income (Loss) Attributable to Common Stockholders		$ (94,188)	$ 364,557
Net Income (Loss) Per Common Share - Basic (in dollars per share)	[1]	$ (1.73)	$ 9.03
Net Income (Loss) Per Common Share - Diluted (in dollars per share)	[1]	$ (1.73)	$ 7.33
Weighted Average Shares Outstanding - Basic (in shares)	[1]	54,538,099	40,366,253
Weighted Average Shares Outstanding - Diluted (in shares)	[1]	54,538,099	49,721,264
Oil and Gas Sales
Revenues
Revenue		$ 157,331	$ 130,196
Other Revenue
Revenues
Revenue		$ 1	$ 8
[1]	Adjusted for the 1-for-10 reverse stock split.

CONDENSED STATEMENTS OF OPERA_2

CONDENSED STATEMENTS OF OPERATIONS (UNAUDITED) (Parenthetical)	Sep. 18, 2020
Statement of Comprehensive Income [Abstract]
Reverse stock split ratio	0.1

CONDENSED STATEMENTS OF CASH FL

CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities
Net Income (Loss)	$ (90,357)	$ 368,286
Adjustments to Reconcile Net Income (Loss) to Net Cash Provided by Operating Activities:
Depletion, Depreciation, Amortization and Accretion	31,221	61,809
Amortization of Debt Issuance Costs	1,014	1,461
Loss on Extinguishment of Debt	12,594	5,527
Amortization of Bond Premium on Long-term Debt	(122)	(321)
Deferred Income Taxes	0	210
Unrealized (Gain) Loss of Derivative Instruments	128,398	(344,398)
Loss on Contingent Consideration	125	0
Stock-Based Compensation Expense	769	1,079
Other	(61)	(57)
Changes in Working Capital and Other Items:
Accounts Receivable, Net	(23,694)	10,789
Prepaid and Other Expenses	(1,037)	(251)
Accounts Payable	5,057	(1,514)
Accrued Interest	(2,588)	(2,290)
Accrued Liabilities and Expenses	1,447	327
Net Cash Provided by Operating Activities	62,766	100,654
Cash Flows from Investing Activities
Drilling and Development Capital Expenditures	(33,331)	(78,962)
Acquisition of Oil and Natural Gas Properties	(1,790)	(25,537)
Acquisition Deposit	(17,500)	0
Purchases of Other Property and Equipment	(51)	0
Net Cash Used for Investing Activities	(52,672)	(104,500)
Cash Flows from Financing Activities
Advances on Revolving Credit Facility	109,000	25,000
Repayments on Revolving Credit Facility	(378,000)	(15,000)
Repurchases of Second Lien Notes due 2023	(280,249)	(13,277)
Repayment of Unsecured VEN Bakken Note due 2022	(130,000)	0
Debt Issuance Costs Paid	(11,607)	(37)
Issuance of Common Stock	132,900	0
Issuance of Unsecured VEN Bakken Note	550,000	0
Restricted Stock Surrenders - Tax Obligations	(837)	(396)
Net Cash Used for Financing Activities	(8,793)	(3,710)
Net Increase (Decrease) in Cash and Cash Equivalents	1,301	(7,555)
Cash and Cash Equivalents - Beginning of Period	1,428	16,068
Cash and Cash Equivalents - End of Period	$ 2,729	$ 8,512

CONDENSED STATEMENTS OF STOCKHO

CONDENSED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($) $ in Thousands		Total	Common Stock		Preferred Stock	Additional Paid-in Capital	Retained Earnings (Deficit)
Beginning balance (in shares) at Dec. 31, 2019			40,608,518	[1]	1,500,000
Beginning balance at Dec. 31, 2019		$ 558,643	$ 406	[1]	$ 2	$ 1,431,438	$ (873,203)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock (in shares)	[1]		5,000
Issuance of Common Stock		0	$ 0	[1]
Share Based Compensation		1,263				1,263
Restricted Stock Surrenders - Tax Obligations (in shares)	[1]		(33,200)
Restricted Stock Surrenders - Tax Obligations		(396)				(396)
Equity Offerings and Issuance of Preferred Stock, Net of Issuance Costs (in shares)					794,702
Equity Offerings, Net of Issuance Costs		81,212			$ 1	81,211
Net Income (Loss)		368,286					368,286
Ending balance (in shares) at Mar. 31, 2020			40,580,318	[1]	2,294,702
Ending balance at Mar. 31, 2020		1,009,007	$ 406	[1]	$ 2	1,513,516	(504,917)
Beginning balance (in shares) at Dec. 31, 2020			45,908,779	[1]	2,218,732
Beginning balance at Dec. 31, 2020		(223,304)	$ 448	[1]	$ 2	1,556,602	(1,780,357)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Common Stock (in shares)	[1]		138,297
Issuance of Common Stock		0	$ 0	[1]
Share Based Compensation		916				916
Restricted Stock Surrenders - Tax Obligations (in shares)	[1]		(60,529)
Restricted Stock Surrenders - Tax Obligations		(837)				(837)
Equity Offerings and Issuance of Preferred Stock, Net of Issuance Costs (in shares)	[1]		14,375,000
Equity Offerings, Net of Issuance Costs		132,900	$ 14	[1]		132,885
Net Income (Loss)		(90,357)					(90,357)
Ending balance (in shares) at Mar. 31, 2021			60,361,547	[1]	2,218,732
Ending balance at Mar. 31, 2021		$ (180,682)	$ 462	[1]	$ 2	$ 1,689,567	$ (1,870,714)
[1]	Adjusted for the 1-for-10 reverse stock split.

CONDENSED STATEMENTS OF STOCK_2

CONDENSED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) (Parenthetical)	Sep. 18, 2020
Statement of Stockholders' Equity [Abstract]
Reverse stock split ratio	0.1

ORGANIZATION AND NATURE OF BUSI

ORGANIZATION AND NATURE OF BUSINESS	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION AND NATURE OF BUSINESS	ORGANIZATION AND NATURE OF BUSINESS Northern Oil and Gas, Inc. (the “Company,” “Northern,” “our” and words of similar import), a Delaware corporation, is an independent energy company engaged in the acquisition, exploration, exploitation, development and production of crude oil and natural gas properties. The Company’s common stock trades on the NYSE American market under the symbol “NOG”. Northern’s principal business is crude oil and natural gas exploration, development, and production with operations in the United States. The Company’s primary strategy is investing in non-operated minority working and mineral interests in oil and gas properties in the United States.

BASIS OF PRESENTATION AND SIGNI

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The financial information included herein is unaudited. The balance sheet as of December 31, 2020 has been derived from the Company’s audited financial statements for the year ended December 31, 2020. However, such information includes all adjustments (consisting of normal recurring adjustments and change in accounting principles) that are, in the opinion of management, necessary for a fair presentation of financial position, results of operations and cash flows for the interim periods. The results of operations for interim periods are not necessarily indicative of the results to be expected for an entire year. Certain information, accounting policies, and footnote disclosures normally included in the financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted in this Form 10-Q pursuant to certain rules and regulations of the Securities and Exchange Commission (“SEC”). The condensed financial statements should be read in conjunction with the audited financial statements for the year ended December 31, 2020, which were included in the Company’s 2020 Annual Report on Form 10-K for the fiscal year ended December 31, 2020. Reverse Stock Split On September 18, 2020, the Company effected a 1-for-10 reverse stock split of its common stock. Unless otherwise noted, impacted amounts and share information included in the financial statements and notes thereto, and elsewhere in this Form 10-Q, have been retroactively adjusted as if the reverse stock split occurred on the first day of the first period presented. Certain amounts may be slightly different than previously reported due to the settlement of fractional shares as a result of the reverse stock split and rounding. See Note 5 below for more information regarding the reverse stock split. Use of Estimates The preparation of financial statements under GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates relate to proved crude oil and natural gas reserves, which includes limited control over future development plans as a non-operator, estimates relating to certain crude oil and natural gas revenues and expenses, fair value of derivative instruments, fair value of contingent consideration, acquisition date fair values of assets acquired and liabilities assumed, impairment of crude oil and natural gas properties, asset retirement obligations and deferred income taxes. Actual results may differ from those estimates. The Company considered the impact of the novel coronavirus 2019 (“COVID-19”) pandemic on the assumptions and estimates used by management in the unaudited condensed financial statements for the reporting periods presented. Management’s estimates and assumptions were based on historical data and consideration of future market conditions. Given the uncertainty inherent in any projection, which is heightened by the possibility of unforeseen additional impacts from the COVID-19 pandemic, actual results may differ from the estimates and assumptions used, and conditions may change, which could materially affect amounts reported in the unaudited condensed financial statements in the near term. Adopted and Recently Issued Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles and also simplification of areas such as separate entity financial statements and interim recognition of enactment of tax laws or rate changes. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, including interim reporting periods within those years. The Company adopted the new standard on January 1, 2021 on a prospective basis, which did not have a material impact on its financial position, results of operations, or cash flows. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (LIBOR). The amendment provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This amendment is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s condensed financial statements. Revenue Recognition The Company’s revenues are primarily derived from its interests in the sale of oil and natural gas production. The Company recognizes revenue from its interests in the sales of crude oil and natural gas in the period that its performance obligations are satisfied. Performance obligations are satisfied when the customer obtains control of product, when the Company has no further obligations to perform related to the sale, when the transaction price has been determined and when collectability is probable. The sales of oil and natural gas are made under contracts which the third-party operators of the wells have negotiated with customers, which typically include variable consideration that is based on pricing tied to local indices and volumes delivered in the current month. The Company receives payment from the sale of oil and natural gas production from one to three months after delivery. At the end of each month when the performance obligation is satisfied, the variable consideration can be reasonably estimated and amounts due from customers are accrued in trade receivables, net in the balance sheets. Variances between the Company’s estimated revenue and actual payments are recorded in the month the payment is received, however, differences have been and are insignificant. Accordingly, the variable consideration is not constrained. The Company does not disclose the value of unsatisfied performance obligations under its contracts with customers as it applies the practical exemption in accordance with ASC 606. The exemption, as described in ASC 606-10-50-14(a), applies to variable consideration that is recognized as control of the product is transferred to the customer. Since each unit of product represents a separate performance obligation, future volumes are wholly unsatisfied, and disclosure of the transaction price allocated to remaining performance obligations is not required. The Company’s oil is typically sold at delivery points under contract terms that are common in our industry. The Company’s natural gas produced is delivered by the well operators to various purchasers at agreed upon delivery points under a limited number of contract types that are also common in our industry. Regardless of the contract type, the terms of these contracts compensate the well operators for the value of the oil and natural gas at specified prices, and then the well operators will remit payment to the Company for its share in the value of the oil and natural gas sold. A wellhead imbalance liability equal to the Company’s share is recorded to the extent that the Company’s well operators have sold volumes in excess of its share of remaining reserves in an underlying property. However, for the three months ended March 31, 2021 and 2020, the Company’s natural gas production was in balance, meaning its cumulative portion of natural gas production taken and sold from wells in which it has an interest equaled its entitled interest in natural gas production from those wells. The Company’s disaggregated revenue has two revenue sources, which are oil sales and natural gas and NGL sales, and substantially all of the Company’s revenue comes from one geographic area, the Williston Basin in the United States, primarily in North Dakota and Montana. Oil sales for the three months ended March 31, 2021 and 2020 were $135.6 million and $116.3 million, respectively. Natural gas and NGL sales for the three months ended March 31, 2021 and 2020 were $21.7 million and $13.9 million, respectively. Concentrations of Market, Credit Risk and Other Risks The future results of the Company’s crude oil and natural gas operations will be affected by the market prices of crude oil and natural gas. The availability of a ready market for crude oil and natural gas products in the future will depend on numerous factors beyond the control of the Company, including weather, imports, marketing of competitive fuels, proximity and capacity of crude oil and natural gas pipelines and other transportation facilities, any oversupply or undersupply of crude oil, natural gas and liquid products, economic disruptions resulting from the COVID-19 pandemic, the regulatory environment, the economic environment, and other regional and political events, none of which can be predicted with certainty. The Company operates in the exploration, development and production sector of the crude oil and natural gas industry. The Company’s receivables include amounts due, indirectly via the third-party operators of the wells, from purchasers of its crude oil and natural gas production. While certain of these customers, as well as third-party operators of the wells, are affected by periodic downturns in the economy in general or in their specific segment of the crude oil or natural gas industry, the Company believes that its level of credit-related losses due to such economic fluctuations have been immaterial. As a non-operator, 100% of the Company’s wells are operated by third-party operating partners. As a result, the Company is highly dependent on the success of these third-party operators. If they are not successful in the development, exploitation, production and exploration activities relating to the Company’s leasehold interests, or are unable or unwilling to perform, the Company’s financial condition and results of operation could be adversely affected. These risks are heightened in a low commodity price environment, which may present significant challenges to these third-party operators. The Company’s third-party operators will make decisions in connection with their operations that may not be in the Company’s best interests, and the Company may have little or no ability to exercise influence over the operational decisions of its third-party operators. For the three months ended March 31, 2021, the Company’s top four operators made up 55% of total oil and gas sales, compared to 53% for the three months ended March 31, 2020. The Company faces concentration risk due to the fact that substantially all of its oil and natural gas properties are located in North Dakota, Montana and (after the closing of the Reliance Acquisition described in Note 12) Pennsylvania. As a result, the Company is disproportionately exposed to risks affecting these geographic areas of operations. The Company manages and controls market and counterparty credit risk. In the normal course of business, collateral is not required for financial instruments with credit risk. Financial instruments which potentially subject the Company to credit risk consist principally of temporary cash balances and derivative financial instruments. The Company maintains cash and cash equivalents in bank deposit accounts which, at times, may exceed the federally insured limits. The Company has not experienced any significant losses from such investments. The Company attempts to limit the amount of credit exposure to any one financial institution or company. The Company believes the credit quality of its counterparties is generally high. In the normal course of business, letters of credit or parent guarantees may be required for counterparties which management perceives to have a higher credit risk. Net Income (Loss) Per Common Share Basic earnings per share (“EPS”) are computed by dividing net income (loss) attributable to common stockholders (the numerator) by the weighted average number of common shares outstanding for the period (the denominator). Diluted EPS is computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares and potential common shares outstanding (if dilutive) during each period. Potential common shares include shares issuable upon exercise of stock options or warrants and vesting of restricted stock awards, and shares issuable upon conversion of the Series A Preferred Stock (see Note 5). The number of potential common shares outstanding are calculated using the treasury stock or if-converted method. The reconciliation of the denominators used to calculate basic EPS and diluted EPS for the three months ended March 31, 2021 and 2020 are as follows: Three Months Ended (In thousands, except share and per share data) 2021 2020 Net Income (Loss) $ (90,357) $ 368,286 Less: Cumulative Dividends on Preferred Stock (3,830) (3,729) Net Income (Loss) Attributable to Common Stock $ (94,188) $ 364,557 Weighted Average Common Shares Outstanding: Weighted Average Common Shares Outstanding – Basic 54,538,099 40,366,253 Plus: Dilutive Effect of Restricted Stock — 35,470 Plus: Dilutive Effect of Preferred Shares — 9,319,541 Weighted Average Common Shares Outstanding – Diluted 54,538,099 49,721,264 Net Income (Loss) per Common Share: Basic $ (1.73) $ 9.03 Diluted $ (1.73) $ 7.33 Shares Excluded from EPS Due to Anti-Dilutive Effect: Restricted Stock 120,039 143,818 Preferred Stock 9,881,580 — Supplemental Cash Flow Information The following reflects the Company’s supplemental cash flow information: Three Months Ended March 31, (In thousands) 2021 2020 Supplemental Cash Items: Cash Paid During the Period for Interest, Net of Amount Capitalized $ 12,525 $ 15,990 Cash Paid During the Period for Income Taxes — — Non-cash Investing Activities: Oil and Natural Gas Properties Included in Accounts Payable and Accrued Liabilities 91,072 143,220 Capitalized Asset Retirement Obligations 205 259 Compensation Capitalized on Oil and Gas Properties 147 184 Non-cash Financing Activities: Issuance of Preferred Stock for 2L Notes Repurchase — 81,212

CRUDE OIL AND NATURAL GAS PROPE

CRUDE OIL AND NATURAL GAS PROPERTIES	3 Months Ended
	Mar. 31, 2021
Oil and Gas Exploration and Production Industries Disclosures [Abstract]
CRUDE OIL AND NATURAL GAS PROPERTIES	CRUDE OIL AND NATURAL GAS PROPERTIESThe Company follows the full cost method of accounting for crude oil and natural gas operations whereby all costs related to the exploration and development of crude oil and natural gas properties are capitalized into a single cost center (“full cost pool”). Such costs include land acquisition costs, geological and geophysical expenses, carrying charges on non-producing properties, costs of drilling directly related to acquisition, and exploration activities. Internal costs that are capitalized are directly attributable to acquisition, exploration and development activities and do not include costs related to production, general corporate overhead or similar activities. Costs associated with production and general corporate activities are expensed in the period incurred. Under the full cost method of accounting, the Company is required to perform a ceiling test each quarter. The test determines a limit, or ceiling, on the book value of the proved oil and gas properties. Net capitalized costs are limited to the lower of unamortized cost net of deferred income taxes, or the cost center ceiling. The Company did not have any impairment of its proved oil and gas properties for the three months ended March 31, 2021 and 2020, respectively. The book value of the Company’s crude oil and natural gas properties consists of all acquisition costs (including cash expenditures and the value of stock consideration), drilling costs and other associated capitalized costs. Acquisitions are accounted for as purchases and, accordingly, the results of operations are included in the accompanying condensed statements of operations from the closing date of the acquisition. Acquired assets and liabilities assumed are recorded based on their estimated fair value at the time of the acquisition. Acquisitions have been funded with internal cash flow, bank borrowings and the issuance of debt and equity securities. 2021 Acquisitions The Company acquired oil and natural gas properties, through a number of independent transactions, for a total of $4.4 million during the three months ended March 31, 2021. These amounts include $1.8 million of associated development costs. See Note 12 regarding the Reliance Acquisition, which the Company closed on April 1, 2021. 2020 Acquisitions The Company acquired oil and natural gas properties, through a number of independent transactions, for a total of $25.5 million during the three months ended March 31, 2020. These amounts include $18.4 million of development costs that occurred prior to the closings of the acquisitions. Unproved Properties All properties that are not classified as proved properties are considered unproved properties and, thus, the costs associated with such properties are not subject to depletion. Once a property is classified as proved, all associated acreage and drilling costs are subject to depletion. The Company historically has acquired unproved properties by purchasing individual or small groups of leases directly from mineral owners, landmen, or lease brokers, which leases historically have not been subject to specified drilling projects, and by purchasing lease packages in identified project areas controlled by specific operators. The Company generally participates in drilling activities on a heads up basis by electing whether to participate in each well on a well-by-well basis at the time wells are proposed for drilling. The Company believes that the majority of its unproved costs will become subject to depletion within the next five years by proving up reserves relating to the acreage through exploration and development activities, by impairing the acreage that will expire before the Company can explore or develop it further or by determining that further exploration and development activity will not occur. The timing by which all other properties will become subject to depletion will be dependent upon the timing of future drilling activities and delineation of its reserves.

LONG-TERM DEBT

LONG-TERM DEBT	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
LONG-TERM DEBT	LONG-TERM DEBT The Company’s long-term debt consisted of the following as of the dates indicated: (In thousands) March 31, 2021 December 31, 2020 Revolving Credit Facility $ 263,000 $ 532,000 Unsecured Notes due 2028 550,000 — Second Lien Notes due 2023 15,669 287,755 Unsecured VEN Bakken Note due 2022 — 130,000 Total principal 828,669 949,755 Unamortized debt discounts and premiums 140 2,041 Unamortized debt issuance costs (1) (11,748) (6,953) Total debt 817,061 944,843 Less current portion of long-term debt — (65,000) Total long-term debt $ 817,061 $ 879,843 ________________ (1) Debt issuance costs related to the Company’s revolving credit facility of $6.1 million and $6.5 million as of March 31, 2021 and December 31, 2020, respectively, are recorded in “Other Noncurrent Assets, Net” on the balance sheets. 2021 First Quarter Refinancing Transactions During the three months ended March 31, 2021, the Company completed a series of financing transactions related to its debt arrangements, which are summarized as follows: • completed a common stock offering with net proceeds of $132.9 million, which was primarily intended to finance the cash purchase price for the Reliance Acquisition (see Note 12) that closed on April 1, 2021, but in the interim reduced the Company’s outstanding indebtedness; • issued $550.0 million in aggregate principal amount of new 8.125% senior unsecured notes due 2028 (the “2028 Notes”), priced at par, with estimated net proceeds of $538.4 million; • fully repaid and retired all $130.0 million in principal amount of the Company’s 6.0% senior unsecured promissory note due 2022 (the “Unsecured VEN Bakken Note”); • redeemed and retired $272.1 million in aggregate principal amount of the Company’s 8.500% senior secured second lien notes due 2023 (the “Second Lien Notes”) pursuant to a cash tender offer at a cost of $280.2 million including premiums; and • reduced the amount of borrowings outstanding under the Revolving Credit Facility (defined below) from $532.0 million as of December 31, 2020 to $263.0 million as of March 31, 2021. Revolving Credit Facility On November 22, 2019, the Company entered into a Second Amended and Restated Credit Agreement (the “Revolving Credit Facility”) with Wells Fargo Bank, National Association, as administrative agent, and the lenders from time to time party thereto, which amended and restated the Company’s prior revolving credit facility that was entered into on October 5, 2018. The Revolving Credit Facility is scheduled to mature on November 22, 2024. The Revolving Credit Facility is subject to a borrowing base with maximum loan value to be assigned to the proved reserves attributable to the Company and its subsidiaries’ (if any) oil and gas properties. The borrowing base as of March 31, 2021 was $660.0 million. The borrowing base will be redetermined semiannually on or around April 1st and October 1st, with one interim “wildcard” redetermination available between scheduled redeterminations. The April 1st scheduled redetermination shall be based on a January 1st engineering report audited by a third party (reasonably acceptable by the Agent). At the Company’s option, borrowings under the Revolving Credit Facility shall bear interest at the base rate or LIBOR plus an applicable margin. Base rate loans bear interest at a rate per annum equal to the greatest of: (i) the agent bank’s prime rate; (ii) the federal funds effective rate plus 50 basis points; and (iii) the adjusted LIBOR rate for a one-month interest period plus 100 basis points. The applicable margin for base rate loans ranges from 100 to 200 basis points, and the applicable margin for LIBOR loans ranges from 200 to 300 basis points, in each case depending on the percentage of the borrowing base utilized. The Revolving Credit Facility contains negative covenants that limit the Company’s ability, among other things, to pay dividends, incur additional indebtedness, maintain excess cash liquidity, sell assets, enter into certain derivatives contracts, change the nature of its business or operations, merge, consolidate, or make certain types of investments. In addition, the Revolving Credit Facility requires that the Company comply with the following financial covenants: (i) as of the date of determination, the ratio of total net debt to EBITDAX (as defined in the Revolving Credit Facility) shall be no more than 3.50 to 1.00, measured on a pro forma rolling four quarter basis, and (ii) the current ratio (defined as consolidated current assets including unused amounts of the total commitments, but excluding non-cash assets under FASB ASC 815, divided by consolidated current liabilities excluding current non-cash obligations under FASB ASC 815 and current maturities under the Revolving Credit Facility, the Second Lien Notes and the Unsecured VEN Bakken Note) shall not be less than 1.00 to 1.00. The Company is in compliance with these financial covenants as of March 31, 2021. The Company’s obligations under the Revolving Credit Facility may be accelerated, subject to customary grace and cure periods, upon the occurrence of certain Events of Default (as defined in the Revolving Credit Facility). Such Events of Default include customary events for a financing agreement of this type, including, without limitation, payment defaults, the inaccuracy of representations and warranties, defaults in the performance of affirmative or negative covenants, defaults on other indebtedness of us or the Company’s subsidiaries, defaults related to judgments and the occurrence of a Change in Control (as defined in the Revolving Credit Facility). The Company’s obligations under the Revolving Credit Facility are secured by mortgages on not less than 90% of the value of proven reserves associated with the oil and gas properties included in the determination of the borrowing base. Additionally, the Company entered into a Guaranty and Collateral Agreement in favor of the Agent for the secured parties, pursuant to which the Company’s obligations under the Revolving Credit Facility are secured by a first priority security interest in substantially all of the Company’s assets. Unsecured Notes due 2028 On February 18, 2021, the Company and Wilmington Trust, National Association, as trustee, entered into an indenture (the “2028 Notes Indenture”), pursuant to which the Company issued $550.0 million in aggregate principal amount of the 2028 Notes. The proceeds were used to refinance existing indebtedness, pay a portion of the cash purchase price for the Reliance Acquisition (see Note 12) that closed on April 1, 2021, and for general corporate purposes. The 2028 Notes will mature on March 1, 2028. Interest on the 2028 Notes is payable semi-annually in arrears on each March 1 and September 1, commencing September 1, 2021, to holders of record on the February 15 and August 15 immediately preceding the related interest payment date, at a rate of 8.125% per annum. Prior to March 1, 2024, the Company may redeem all or a part of the 2028 Notes at a redemption price equal to 100% of the principal amount of the 2028 Notes redeemed, plus an applicable make-whole premium and accrued and unpaid interest to the redemption date. On or after March 1, 2024, the Company may redeem all or a part of the 2028 Notes at redemption prices (expressed as percentages of principal amount) equal to 104.063% for the twelve-month period beginning on March 1, 2024, 102.031% for the twelve-month period beginning on March 1, 2025, and 100% beginning on March 1, 2026, plus accrued and unpaid interest to the redemption date. The 2028 Notes Indenture contains covenants that, among other things, limit the Company’s ability and the ability of its restricted subsidiaries, if any, to: (i) incur or guarantee additional indebtedness or issue certain types of preferred stock; (ii) pay dividends or distributions in respect of equity interests or redeem, repurchase or retire equity securities or subordinated indebtedness; (iii) transfer or sell certain assets; (iv) make investments; (v) create liens to secure indebtedness; (vi) enter into agreements that restrict dividends or other payments from any non-guarantor subsidiary to the Company; (vii) consolidate with or merge with or into, or sell substantially all of the Company’s assets to, another person; (viii) enter into transactions with affiliates; and (ix) create unrestricted subsidiaries. These covenants are subject to a number of important exceptions and qualifications, and many of these covenants will be terminated if the 2028 Notes achieve an investment grade rating from either Moody’s Investors Services, Inc. or S&P Global Ratings. The 2028 Notes Indenture contains customary events of default, including, but not limited to: (i) default for 30 days in the payment when due of interest on the 2028 Notes; (ii) default in payment when due of the principal of, or premium, if any, on the 2028 Notes; (iii) failure by the Company or certain of its subsidiaries, if any, to comply with certain of their respective obligations, covenants or agreements contained in the 2028 Notes or the 2028 Notes Indenture, subject to certain notice and grace periods; (iv) failure by the Company or any of its restricted subsidiaries to pay indebtedness within any applicable grace period or the acceleration of any such indebtedness if the total amount of such indebtedness exceeds $35.0 million; (v) failure by the Company or any of its restricted subsidiaries that is a Significant Subsidiary (as defined in the 2028 Notes Indenture) to pay final non-appealable judgments aggregating in excess of $35.0 million, which judgments are not paid, discharged or stayed for a period of 60 days; (vi) except as permitted by the 2028 Notes Indenture, any guarantee of the 2028 Notes is held in any judicial proceeding to be unenforceable or invalid, or ceases for any reason to be in full force and effect, or is denied or disaffirmed by a Guarantor (as defined in the 2028 Notes Indenture); and (vii) certain events of bankruptcy or insolvency described in the 2028 Notes Indenture with respect to the Company and its restricted subsidiaries that are Significant Subsidiaries. Second Lien Notes due 2023 In May 2018, the Company issued Second Lien Notes with an aggregate principal amount of $344.3 million (the “Original 2L Notes”) in exchange for certain previously outstanding 8.000% senior unsecured notes due June 1, 2020 (the “Unsecured Notes”). In October 2018, the Company issued an additional $350.0 million aggregate principal amount of Second Lien Notes (the “Additional 2L Notes”), the proceeds of which were used in connection with the retirement of the Company’s prior term loan credit agreement. In addition, as of and through March 31, 2021, the Company had issued another $4.3 million of additional aggregate principal amount of Second Lien Notes pursuant to the interest payment-in-kind provisions thereof. During 2019, the Company repurchased and retired $10.1 million in aggregate principal amount of Second Lien Notes in open market transactions. In November 2019, the Company completed a cash tender offer to redeem and repay $200.0 million principal amount of Second Lien Notes. Also in November 2019, the Company redeemed and repaid $70.8 million principal amount of Second Lien Notes in exchange for shares of Series A Preferred Stock. During 2020, the Company repurchased and retired $13.5 million in aggregate principal amount of Second Lien Notes in open market transactions for cash. During 2020, the Company also repurchased and retired $116.5 million in aggregate principal amount of Second Lien Notes pursuant to a number of independent, separately negotiated agreements in exchange for aggregate consideration consisting primarily of shares of Series A Preferred Stock and common stock. During the three months ended March 31, 2021, the Company completed a cash tender offer (the “Tender Offer”) pursuant to which it redeemed and retired $272.1 million in aggregate principal amount of the Second Lien Notes. Immediately thereafter, there was $15.7 million in aggregate principal amount of Second Lien Notes remaining outstanding, which the Company intends to redeem and retire on or about May 15, 2021. In connection with the Tender Offer, the Company also obtained the consent of holders to amend the indenture governing the Second Lien Notes (the “2L Indenture”). As a result, on February 18, 2021, the Company entered into the Fourth Supplemental Indenture (the “Fourth Supplemental Indenture”) with Wilmington Trust, National Association, as trustee and as collateral agent, which, among other things, amended the 2L Indenture to eliminate substantially all restrictive covenants and certain of the default provisions contained therein. Unsecured VEN Bakken Note On July 1, 2019, the Company issued a 6.0% unsecured promissory note due July 1, 2022, in the aggregate principal amount of $130.0 million to VEN Bakken, LLC in connection with the Company’s acquisition of certain oil and gas properties from VEN Bakken, LLC. Fifty percent (50%) of the original principal amount of the Unsecured VEN Bakken Note was required to be repaid by the Company on or before January 1, 2021, and the remaining unpaid principal amount was required to be repaid by the Company on or before July 1, 2022, in each case together with all accrued but unpaid interest thereon. Interest, at a rate of 6.0% per annum, was due quarterly in arrears on the first day of each calendar quarter, commencing on October 1, 2019. The Unsecured VEN Bakken Note did not include any financial maintenance covenants and is unsecured. On January 4, 2021, the Company repaid $65.0 million in aggregate principal amount under the Unsecured VEN Bakken Note, which was a scheduled repayment thereunder. On February 18, 2021, the Company used a portion of the proceeds from the 2028 Notes to repay the remaining $65.0 million in aggregate principal amount outstanding under the Unsecured VEN Bakken Note, and as a result the note has been retired in full.

COMMON AND PREFERRED STOCK

COMMON AND PREFERRED STOCK	3 Months Ended
	Mar. 31, 2021
Equity [Abstract]
COMMON AND PREFERRED STOCK	COMMON AND PREFERRED STOCK Common Stock On September 18, 2020, the Company effected a 1-for-10 reverse stock split of the Company’s issued and outstanding shares of common stock (the “Reverse Stock Split”). The Company’s common stock began trading on a split‑adjusted basis when the market opened on September 21, 2020. As a result of the Reverse Stock Split, every ten shares of the Company’s issued and outstanding common stock automatically converted into one share of common stock, without any change in the par value per share. A total of 44,663,990 shares of common stock were issued and outstanding immediately after the Reverse Stock Split became effective on September 18, 2020. No fractional shares were outstanding following the Reverse Stock Split. In connection with the Reverse Stock Split, the number of authorized shares of the Company’s common stock was reduced to 135,000,000 shares of common stock, par value $0.001 per share. As of March 31, 2021, the Company had 60,361,547 shares of common stock issued and outstanding. Preferred Stock The Company is authorized to issue up to 5,000,000 shares of preferred stock, par value $0.001 per share, with such designations, voting and other rights and preferences as may be determined from time to time by the Board of Directors. As of March 31, 2021, the Company had 2,218,732 shares of preferred stock issued and outstanding, all of which were shares of 6.500% Series A Perpetual Cumulative Convertible Preferred Stock (the “Series A Preferred Stock”). The terms of the Series A Preferred Stock are set forth in the Certificate of Designations for the Series A Preferred Stock (the “Certificate of Designations”), as originally filed with the Delaware Secretary of State on November 22, 2019, and as amended thereafter. The Series A Preferred Stock ranks senior to the Company’s common stock with respect to the payment of dividends and distribution of assets upon liquidation, dissolution or winding-up. Holders of the Series A Preferred Stock are entitled to receive, when, as and if declared by the board of directors of the Company, cumulative dividends in cash, at a rate of 6.500% per annum on the sum of (i) the $100 liquidation preference per share of Series A Preferred Stock (the “Liquidation Preference”) and (ii) all accumulated and unpaid dividends (if any), payable semi-annually in arrears on May 15 and November 15 of each year, commencing on May 15, 2020. As of March 31, 2021, no dividends had been declared or paid, and there were $20.1 million of undeclared accumulated dividends on the Series A Preferred Stock. On April 23, 2021, the Company declared a dividend in the amount of $9.9163 per share to be paid on May 15, 2021 to the holders of record of the Series A Preferred Stock as of May 1, 2021. This dividend, which totals $22.0 million in the aggregate, is inclusive of all accrued and unpaid dividends from the original issue date of the Series A Preferred Stock. The Reverse Stock Split did not affect the number of authorized or issued and outstanding shares of the Company’s preferred stock, nor the liquidation per share preference. As a result of the Reverse Stock Split and per the terms of the Certificate of Designations, the conversion rate for the Company’s outstanding Series A Preferred Stock was automatically decreased to 4.363 shares of common stock for each share of Series A Preferred Stock (previously it was 43.63 shares of common stock). The effect of the Reverse Stock Split resulted in the Company recalculating its historical, basic and diluted EPS to reflect the 1-for-10 reverse stock split, effective September 18, 2020. The Series A Preferred Stock is convertible at the holders’ option (an “Optional Conversion”) into common stock at a conversion rate set forth in the Certificate of Designations, subject to customary adjustments as provided for therein. As of March 31, 2021, the conversion rate was 4.363 shares of common stock for each share of Series A Preferred Stock (which is equivalent to a conversion price of approximately $22.92 per share of common stock). Holders may be entitled to additional shares of common stock or cash in connection with a conversion that occurs in connection with a Fundamental Change (as defined in the Certificate of Designations). The Series A Preferred Stock is convertible at the Company’s option (a “Mandatory Conversion”) if the closing sale price of the Company’s common stock equals or exceeds 145% of the conversion price for at least 20 trading days (whether or not consecutive) in a period of 30 consecutive trading days. A Mandatory Conversion would also entitle the holder to a cash payment equal to eight semi-annual dividend payments, less an amount equal to all cash dividend payments made in respect of such holder’s shares of Series A Preferred Stock prior to such Mandatory Conversion. The occurrence of any Optional Conversion or Mandatory Conversion is subject to various terms and limitations set forth in the Certificate of Designations. The Certificate of Designations also sets forth additional information relating to the payment of dividends, voting, conversion rights, consent rights, liquidation rights, the ranking of the Series A Preferred Stock in comparison with the Company’s other securities, and other matters. 2021 Activity Common Stock On February 9, 2021, the Company closed an underwritten public offering (the “Equity Offering”) of 14,375,000 shares of its common stock at a price to the public of $9.75 per share. The Equity Offering resulted in net proceeds of approximately $132.9 million, after deducting underwriting discounts and commissions and estimated offering expenses. During the three months ended March 31, 2021, 60,529 shares of common stock were surrendered by certain employees of the Company to cover tax obligations in connection with their restricted stock awards. The total value of these shares was approximately $0.8 million, which is based on the market prices on the dates the shares were surrendered. Stock Repurchase Program In May 2011, the Company’s board of directors approved a stock repurchase program to acquire up to $150.0 million of the Company’s outstanding common stock. The stock repurchase program allows the Company to repurchase its shares from time to time in the open market, block transactions and in negotiated transactions. During the three months ended March 31, 2021 and March 31, 2020, the Company did not repurchase shares of its common stock under the stock repurchase program. The Company’s accounting policy upon the repurchase of shares is to deduct its par value from common stock and to reflect any excess of cost over par value as a deduction from Additional Paid-in Capital. All repurchased shares are now included in the Company’s pool of authorized but unissued shares.

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION The Company maintains its 2018 Equity Incentive Plan (the “2018 Plan”), which replaced the Company’s prior 2013 Incentive Plan (the “2013 Plan”), for making equity-based awards to employees, directors and other eligible persons. No future awards will be made under the 2013 Plan. The 2013 Plan continues to govern awards that were made thereunder, which remain in effect pursuant to their terms. As of March 31, 2021, there were 769,755 shares available for future awards under the 2018 Plan. In connection with the Reverse Stock Split (see Note 5), the Company reduced the number of shares of common stock available for issuance under the Company’s equity incentive plans in proportion to the Reverse Stock Split ratio of 1-for-10. The Reverse Stock Split also reduced the number of shares of common stock issuable upon the vesting of its RSAs in proportion to the Reverse Stock Split ratio of 1-for-10 and caused a proportionate increase in share-based performance criteria applicable to such awards. The Reverse Stock Split has no impact on Net Income (Loss) or total Stockholders’ Equity and for the three months ended March 31, 2021 and 2020. The Company recognizes the fair value of stock-based compensation awards expected to vest over the requisite service period as a charge against earnings, net of amounts capitalized. The Company’s stock-based compensation awards are accounted for as equity instruments and are included in the “General and administrative expenses” line item in the unaudited statements of operations. The Company capitalizes a portion of stock-based compensation for employees who are directly involved in the acquisition of oil and natural gas properties into the full cost pool. Capitalized stock-based compensation is included in the “Oil and natural gas properties” line item in the unaudited balance sheets. The 2018 Plan and 2013 Plan award types are summarized as follows: Restricted Stock Awards The Company issues restricted stock awards (“RSAs”) subject to various vesting conditions as compensation to executive officers, employees and directors of the Company. RSAs issued to employees and executive officers generally vest over three years, provided that any performance and/or market conditions are also met. RSAs issued to directors generally vest over one year, provided that any performance and/or market conditions are also met. For RSAs subject to service and/or performance vesting conditions, the grant-date fair value is established based on the closing price of the Company’s common stock on such date. Stock-based compensation expense for awards subject to only service conditions is recognized on a straight-line basis over the service period. Stock-based compensation expense for awards with both service and performance conditions is recognized on a graded basis only if it is probable that the performance condition will be achieved. The Company accounts for forfeitures of awards granted under these plans as they occur in determining stock-based compensation expense. For awards subject to a market condition, the grant-date fair value is estimated using a Monte Carlo valuation model. The Company recognizes stock-based compensation expense for awards subject to market-based vesting conditions regardless of whether it becomes probable that these conditions will be achieved or not, and stock-based compensation expense for any such awards is not reversed if vesting does not actually occur. The Monte Carlo model is based on random projections of stock price paths and must be repeated numerous times to achieve a probabilistic assessment. Expected volatility is calculated based on the historical volatility and implied volatility of the Company’s common stock, and the risk-free interest rate is based on U.S. Treasury yield curve rates with maturities consistent with the three-year vesting period. The following table reflects the outstanding RSAs and activity related thereto for the three months ended March 31, 2021: Service-based Awards Service and Performance-based Awards Service and Market-based Awards Service, Performance, and Market-based Awards Number of Shares Weighted-average Grant Date Fair Value Number of Shares Weighted-average Grant Date Fair Value Number of Shares Weighted-average Grant Date Fair Value Number of Shares Weighted-average Grant Date Fair Value Outstanding at December 31, 2020 268,602 $ 10.44 16,250 $ 27.00 5,245 $ 16.70 39,200 $ 9.80 Shares granted 138,297 11.76 — — — — — — Shares forfeited — — — — — — — — Shares vested (91,071) 10.60 (16,250) 27.00 (5,245) 16.70 (19,600) 9.80 Outstanding at March 31, 2021 315,828 $ 10.97 — $ — — $ — 19,600 $ 9.80 At March 31, 2021, there was $3.8 million of total unrecognized compensation expense related to unvested RSAs. That cost is expected to be recognized over a weighted average period of 1.2 years. For the three months ended March 31, 2021 and 2020, the total fair value of the Company’s restricted stock awards vested was $1.8 million and $1.2 million, respectively.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	3 Months Ended
	Mar. 31, 2021
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONSThe Company’s Audit Committee is responsible for approving all transactions involving related parties.

COMMITMENTS & CONTINGENCIES

COMMITMENTS & CONTINGENCIES	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS & CONTINGENCIES	COMMITMENTS & CONTINGENCIES Litigation The Company is engaged in various proceedings incidental to the normal course of business. Due to their nature, such legal proceedings involve inherent uncertainties, including but not limited to, court rulings, negotiations between affected parties and governmental intervention. Based upon the information available to the Company and discussions with legal counsel, it is the Company’s opinion that the outcome of the various legal actions and claims that are incidental to its business will not have a material impact on the Company’s financial position, results of operations or cash flows. Such matters, however, are subject to many uncertainties, and the outcome of any matter is not predictable with assurance. The Company’s interests in certain crude oil and natural gas leases from the State of North Dakota are subject to an ongoing dispute over the ownership of minerals underlying the bed of the Missouri River within the boundaries of the Fort Berthold Reservation. The ongoing dispute is between the State of North Dakota and three affiliated tribes, both of whom have purported to lease mineral rights in tracts of riverbed within the reservation boundaries. In the event the ongoing dispute results in a final judgment that is adverse to the Company’s interests, the Company would be required to reverse approximately $4.3 million in revenue (net of accrued taxes) that has been accrued since the first quarter of 2013 based on the Company’s purported interest in the crude oil and natural gas leases at issue. Due to the long-term nature of this title dispute, the $4.3 million in accounts receivable is included in “Other Noncurrent Assets, Net” in the condensed balance sheets. The Company fully maintains the validity of its interests in the crude oil and natural gas leases.

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2021
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES Income tax expense during interim periods is based on applying an estimated annual effective income tax rate to year-to-date income, plus any significant unusual or infrequently occurring items which are recorded in the interim period. The provision for income taxes for the three months ended March 31, 2021 and 2020 differs from the amount that would be provided by applying the statutory U.S. federal income tax rate of 21% to pre-tax income due to the recognition of a full valuation allowance during both the three months ended March 31, 2021 and 2020, respectively. In assessing the realizability of deferred tax assets (“DTAs”), management considers whether it is more likely than not that some portion, or all, of the Company’s DTAs will not be realized. In making such determination, the Company considers all available positive and negative evidence, including (i) its earnings history, (ii) its ability to recover net operating loss carry-forwards, (iii) the projected future income and results of operations, and (iv) its ability to use tax planning strategies. If the Company concludes that it is more likely than not that some portion, or all, of its DTAs will not be realized, the tax asset is reduced by a valuation allowance. The Company assesses the appropriateness of its valuation allowance on a quarterly basis. At March 31, 2021 and December 31, 2020, the Company maintains a full valuation allowance on its net DTAs.

FAIR VALUE

FAIR VALUE	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The Company uses a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value which are the following: Level 1 - Quoted prices in active markets for identical assets or liabilities. Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Financial Assets and Liabilities As required, financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. The following tables set forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2021 and December 31, 2020: Fair Value Measurements at March 31, 2021 Using (In thousands) Quoted Prices In Active Markets for Identical Assets (Liabilities) Significant Other Observable Inputs Significant Unobservable Inputs Commodity Derivatives – Current Assets $ — $ 2,005 $ — Commodity Derivatives – Noncurrent Assets — 356 — Commodity Derivatives – Current Liabilities — (34,508) — Commodity Derivatives – Noncurrent Liabilities — (61,808) — Interest Rate Derivatives – Current Liabilities — (600) — Interest Rate Derivatives – Noncurrent Liabilities — (179) — Total $ — $ (94,734) $ — Fair Value Measurements at December 31, 2020 Using (In thousands) Quoted Prices In Active Markets for Identical Assets (Liabilities) Significant Other Observable Inputs Significant Unobservable Inputs Commodity Derivatives – Current Assets $ — $ 51,290 $ — Commodity Derivatives – Current Liabilities — (2,504) — Commodity Derivatives – Noncurrent Assets — 111 — Commodity Derivatives – Noncurrent Liabilities — (14,214) — Interest Rate Derivatives – Current Liabilities — (574) — Interest Rate Derivatives – Noncurrent Liabilities — (445) — Total $ — $ 33,664 $ — Commodity Derivatives. The Level 2 instruments presented in the tables above consist of commodity derivative instruments (see Note 11). The fair value of the Company’s commodity derivative instruments is determined based upon future prices, volatility and time to maturity, among other things. Counterparty statements are utilized to determine the value of the commodity derivative instruments and are reviewed and corroborated using various methodologies and significant observable inputs. The Company’s and the counterparties’ nonperformance risk is evaluated. The fair value of commodity derivative contracts is reflected in the condensed balance sheet. The current derivative asset and liability amounts represent the fair values expected to be settled in the subsequent twelve months. Interest Rate Derivatives. The Level 2 instruments presented in the tables above consist of interest rate derivative instruments (see Note 11). The fair value of the Company’s interest rate derivative instruments is determined based upon contracted notional amounts, active market-quoted LIBOR yield curves, and time to maturity, among other things. Counterparty statements are utilized to determine the value of the interest rate derivative instruments and are reviewed and corroborated using various methodologies and significant observable inputs. The Company’s and the counterparties’ nonperformance risk is evaluated. The fair value of interest rate derivative contracts is reflected in the condensed balance sheet. The current derivative asset and liability amounts represent the fair values expected to be settled in the subsequent twelve months. Fair Value of Other Financial Instruments The carrying amounts of cash equivalents, receivables and payables approximate fair value due to the highly liquid or short-term nature of these instruments. Long-term debt is not presented at fair value in the balance sheets, as it is recorded at carrying value, net of unamortized debt issuance costs and unamortized premium or discount (see Note 4). The fair value of the Company’s Second Lien Notes was $16.0 million and $256.1 million at March 31, 2021 and December 31, 2020, respectively. The fair value of the Company’s 2028 Notes was $547.3 million at March 31, 2021. The fair value of the Company’s Second Lien Notes and 2028 Notes are based on active market quotes, which represent Level 1 inputs. There is no active market for the Revolving Credit Facility. The recorded value of the Revolving Credit Facility approximates its fair value because of its floating rate structure based on the LIBOR spread, secured interest, and the Company’s borrowing base utilization. The fair value measurement for the Revolving Credit Facility represents a Level 2 input. Non-Financial Assets and Liabilities The Company estimates asset retirement obligations pursuant to the provisions of ASC 410. The initial measurement of asset retirement obligations at fair value is calculated using discounted cash flow techniques and based on internal estimates of future retirement costs associated with oil and natural gas properties. Given the unobservable nature of the inputs, including plugging costs and reserve lives, the initial measurement of the asset retirement obligations liability is deemed to use Level 3 inputs. Asset retirement obligations incurred and acquired during the three months ended March 31, 2021 were approximately $0.2 million. Though the Company believes the methods used to estimate fair value are consistent with those used by other market participants, the use of other methods or assumptions could result in a different estimate of fair value. There were no transfers of financial assets or liabilities between Level 1, Level 2 or Level 3 inputs for the three months ended March 31, 2021.

DERIVATIVE INSTRUMENTS AND PRIC

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT	DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT The Company utilizes commodity price swaps, basis swaps, swaptions and call options to (i) reduce the effects of volatility in price changes on the crude oil and natural gas commodities it produces and sells, (ii) reduce commodity price risk and (iii) provide a base level of cash flow in order to assure it can execute at least a portion of its capital spending. In addition, from time to time the Company utilizes interest rate swaps to mitigate exposure to changes in interest rates on the Company’s variable-rate indebtedness. All derivative instruments are recorded in the Company’s balance sheet as either assets or liabilities measured at their fair value (see Note 10). The Company has not designated any derivative instruments as hedges for accounting purposes and does not enter into such instruments for speculative trading purposes. If a derivative does not qualify as a hedge or is not designated as a hedge, the changes in the fair value are recognized in the Company’s condensed statements of operations as a gain or loss on derivative instruments. Mark-to-market gains and losses represent changes in fair values of derivatives that have not been settled. The Company’s cash flow is only impacted when the actual settlements under the derivative contracts result in making or receiving a payment to or from the counterparty. These cash settlements represent the cumulative gains and losses on the Company’s derivative instruments for the periods presented and do not include a recovery of costs that were paid to acquire or modify the derivative instruments that were settled. The Company has master netting agreements on individual derivative instruments with certain counterparties and therefore the current asset and liability are netted in the balance sheet and the non-current asset and liability are netted in the balance sheet for contracts with these counterparties. Commodity Derivative Instruments The following table presents settlements on commodity derivative instruments and unsettled gains and losses on open commodity derivative instruments for the periods presented which is recorded in the revenue section of our condensed financial statements: Three Months Ended (In thousands) 2021 2020 Gain (Loss) on Settled Commodity Derivatives $ (7,297) $ 31,506 Gain (Loss) on Unsettled Commodity Derivatives (128,638) 345,075 Gain (Loss) on Commodity Derivatives, Net $ (135,935) $ 376,581 The following table summarizes open commodity derivative positions as of March 31, 2021, for commodity derivatives that were entered into through March 31, 2021, for the settlement period presented: 2021 2022 2023 2024 Oil: WTI NYMEX - Swaps: Volume (Bbl) 6,350,574 4,218,250 112,500 — Weighted-Average Price ($/Bbl) $ 54.80 $ 51.66 $ 51.65 $ — WTI NYMEX - Swaptions (1) : Volume (Bbl) — 1,496,125 3,691,000 — Weighted-Average Price ($/Bbl) $ — $ 50.13 $ 50.31 $ — Bakken Crude UHC to WTI NYMEX - Basis Swaps: Volume (Bbl) 4,155,800 — — — Weighted-Average Price ($/Bbl) $ (2.40) $ — $ — $ — WTI NYMEX - Call Options (1) : Volume (Bbl) — — 365,000 1,275,000 Weighted-Average Price ($/Bbl) $ — $ — $ 55.00 $ 52.89 Natural Gas: Henry Hub NYMEX - Swaps: Volume (MMBtu) 22,637,745 5,450,000 — — Weighted-Average Price ($/MMBtu) $ 2.81 $ 2.80 $ — $ — Waha Inside FERC to Henry Hub - Basis Swaps: Volume (MMBtu) 69,000 — — — Weighted-Average Differential ($/MMBtu) $ (0.28) $ — $ — $ — Columbia/TCO-POOL - Basis Swaps: Volume (MMBtu) 1,959,697 1,067,187 — — Weighted-Average Differential ($/MMBtu) $ (0.45) $ (0.43) $ — $ — Dominion - App - Basis Swaps: Volume (MMBtu) 653,232 355,729 — — Weighted-Average Differential ($/MMBtu) $ (0.64) $ (0.64) $ — $ — NE - TETCO M2 - Basis Swaps: Volume (MMBtu) 3,919,394 2,134,374 — — Weighted-Average Differential ($/MMBtu) $ (0.68) $ (0.71) $ — $ — NGL: TET-OPIS - Swaps: Volume (Bbl) 92,000 — — — Weighted-Average Price ($/Bbl) $ 34.34 $ — $ — $ — ______________ (1) Swaptions are crude oil derivative contracts that give counterparties the option to extend certain derivative contracts for additional periods. Call Options are crude oil derivative contracts sold by the Company that give counterparties the option to exercise certain derivative contracts. The volumes and prices reflected as Swaptions and Call Options in this table will only be effective if the options are exercised by the applicable counterparties. Interest Rate Derivative Instruments The Company uses interest rate swaps to effectively convert a portion of its variable rate indebtedness to fixed rate indebtedness. As of March 31, 2021, the Company had interest rate swaps with a total notional amount of $200.0 million. The settlement of these derivative instruments is recognized as a component of interest expense in the condensed statements of operations. The mark-to-market component of these derivative instruments is recognized in gain (loss) on unsettled interest rate derivatives, net in the condensed statements of operations. Other Information Regarding Derivative Instruments The following table sets forth the amounts, on a gross basis, and classification of the Company’s outstanding derivative financial instruments at March 31, 2021 and December 31, 2020, respectively. Certain amounts may be presented on a net basis on the condensed financial statements when such amounts are with the same counterparty and subject to a master netting arrangement. Type of Commodity Balance Sheet Location March 31, 2021 Estimated Fair Value December 31, 2020 Estimated Fair Value Derivative Assets: (In thousands) Commodity Price Swap Contracts Current Assets $ 6,390 $ 52,702 Commodity Basis Swap Contracts Current Assets 325 37 Commodity Price Swaptions Contracts Current Assets 246 — Commodity Price Swap Contracts Noncurrent Assets 1,478 3,479 Commodity Price Swaptions Contracts Noncurrent Assets 749 — Interest Rate Swap Contracts Noncurrent Assets 5 — Total Derivative Assets $ 9,193 $ 56,218 Derivative Liabilities: Commodity Price Swap Contracts Current Liabilities $ (29,497) $ (3,434) Commodity Basis Swap Contracts Current Liabilities (6,367) (519) Commodity Price Swaptions Contracts Current Liabilities (3,601) — Interest Rate Swap Contracts Current Liabilities (599) (574) Commodity Price Swap Contracts Noncurrent Liabilities (8,381) (399) Interest Rate Swap Contracts Noncurrent Liabilities (184) (445) Commodity Price Call Option Contracts Noncurrent Liabilities (12,222) — Commodity Price Swaptions Contracts Noncurrent Liabilities (43,076) (17,184) Total Derivative Liabilities $ (103,927) $ (22,554) The use of derivative transactions involves the risk that the counterparties will be unable to meet the financial terms of such transactions. When the Company has netting arrangements with its counterparties that provide for offsetting payables against receivables from separate derivative instruments these assets and liabilities are netted in the balance sheet. The tables presented below provide reconciliation between the gross assets and liabilities and the amounts reflected in the balance sheet. The amounts presented exclude derivative settlement receivables and payables as of the balance sheet dates. Estimated Fair Value at March 31, 2021 (In thousands) Gross Amounts of Gross Amounts Offset Net Amounts of Assets (Liabilities) Presented in the Balance Sheet Offsetting of Derivative Assets: Current Assets $ 6,961 $ (4,956) $ 2,005 Non-Current Assets 2,232 (1,876) 356 Total Derivative Assets $ 9,193 $ (6,833) $ 2,360 Offsetting of Derivative Liabilities: Current Liabilities $ (40,064) $ 4,956 $ (35,108) Non-Current Liabilities (63,863) 1,876 (61,987) Total Derivative Liabilities $ (103,927) $ 6,833 $ (97,094) Estimated Fair Value at December 31, 2020 (In thousands) Gross Amounts of Gross Amounts Offset Net Amounts of Assets (Liabilities) Presented in the Balance Sheet Offsetting of Derivative Assets: Current Assets $ 52,739 $ (1,449) $ 51,290 Non-Current Assets 3,479 (3,369) 111 Total Derivative Assets $ 56,218 $ (4,817) $ 51,401 Offsetting of Derivative Liabilities: Current Liabilities $ (4,527) $ 1,449 $ (3,078) Non-Current Liabilities (18,028) 3,369 (14,659) Total Derivative Liabilities $ (22,554) $ 4,817 $ (17,737) All of the Company’s outstanding derivative instruments are covered by International Swap Dealers Association Master Agreements (“ISDAs”) entered into with parties that are also lenders under the Company’s Revolving Credit Facility. The Company’s obligations under the derivative instruments are secured pursuant to the Revolving Credit Facility, and no additional collateral had been posted by the Company as of March 31, 2021. The ISDAs may provide that as a result of certain circumstances, such as cross-defaults, a counterparty may require all outstanding derivative instruments under an ISDA to be settled immediately. See Note 10 for the aggregate fair value of all derivative instruments that were in a net liability position at March 31, 2021 and December 31, 2020.

SUBSEQUENT EVENT

SUBSEQUENT EVENT	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT Reliance Acquisition On April 1, 2021, the Company completed its acquisition (the “Reliance Acquisition”) of certain oil and gas properties, interests and related assets pursuant to that certain purchase and sale agreement (the “PSA”) with Reliance Marcellus, LLC (“Reliance”), which was entered into on February 3, 2021, but with an effective date of July 1, 2020. The assets acquired by the Company at closing consisted of approximately 95.3 net producing wells and 24.9 net wells in progress, as well as approximately 61,712 net acres, all of which is located in the Appalachian Basin in Pennsylvania. Upon closing on April 1, 2021, the Company paid closing consideration to Reliance consisting of (i) $120.9 million in cash (which includes a $17.5 million cash deposit previously paid by the Company upon the execution of the PSA and held in escrow in accordance with the terms of the PSA) and (ii) warrants (the “Warrants”) to purchase 3,250,000 shares of the Company’s common stock at an exercise price equal to $14.00 per share (subject to certain customary purchase price

BASIS OF PRESENTATION AND SIG_2

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements under GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The most significant estimates relate to proved crude oil and natural gas reserves, which includes limited control over future development plans as a non-operator, estimates relating to certain crude oil and natural gas revenues and expenses, fair value of derivative instruments, fair value of contingent consideration, acquisition date fair values of assets acquired and liabilities assumed, impairment of crude oil and natural gas properties, asset retirement obligations and deferred income taxes. Actual results may differ from those estimates. The Company considered the impact of the novel coronavirus 2019 (“COVID-19”) pandemic on the assumptions and estimates used by management in the unaudited condensed financial statements for the reporting periods presented. Management’s estimates and assumptions were based on historical data and consideration of future market conditions. Given the uncertainty inherent in any projection, which is heightened by the possibility of unforeseen additional impacts from the COVID-19 pandemic, actual results may differ from the estimates and assumptions used, and conditions may change, which could materially affect amounts reported in the unaudited condensed financial statements in the near term.
Adopted and Recentily Issued Accounting Pronouncements	Adopted and Recently Issued Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles and also simplification of areas such as separate entity financial statements and interim recognition of enactment of tax laws or rate changes. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, including interim reporting periods within those years. The Company adopted the new standard on January 1, 2021 on a prospective basis, which did not have a material impact on its financial position, results of operations, or cash flows. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform, which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (LIBOR). The amendment provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This amendment is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and this ASU on the Company’s condensed financial statements.
Revenue Recognition	Revenue Recognition The Company’s revenues are primarily derived from its interests in the sale of oil and natural gas production. The Company recognizes revenue from its interests in the sales of crude oil and natural gas in the period that its performance obligations are satisfied. Performance obligations are satisfied when the customer obtains control of product, when the Company has no further obligations to perform related to the sale, when the transaction price has been determined and when collectability is probable. The sales of oil and natural gas are made under contracts which the third-party operators of the wells have negotiated with customers, which typically include variable consideration that is based on pricing tied to local indices and volumes delivered in the current month. The Company receives payment from the sale of oil and natural gas production from one to three months after delivery. At the end of each month when the performance obligation is satisfied, the variable consideration can be reasonably estimated and amounts due from customers are accrued in trade receivables, net in the balance sheets. Variances between the Company’s estimated revenue and actual payments are recorded in the month the payment is received, however, differences have been and are insignificant. Accordingly, the variable consideration is not constrained. The Company does not disclose the value of unsatisfied performance obligations under its contracts with customers as it applies the practical exemption in accordance with ASC 606. The exemption, as described in ASC 606-10-50-14(a), applies to variable consideration that is recognized as control of the product is transferred to the customer. Since each unit of product represents a separate performance obligation, future volumes are wholly unsatisfied, and disclosure of the transaction price allocated to remaining performance obligations is not required. The Company’s oil is typically sold at delivery points under contract terms that are common in our industry. The Company’s natural gas produced is delivered by the well operators to various purchasers at agreed upon delivery points under a limited number of contract types that are also common in our industry. Regardless of the contract type, the terms of these contracts compensate the well operators for the value of the oil and natural gas at specified prices, and then the well operators will remit payment to the Company for its share in the value of the oil and natural gas sold. A wellhead imbalance liability equal to the Company’s share is recorded to the extent that the Company’s well operators have sold volumes in excess of its share of remaining reserves in an underlying property. However, for the three months ended March 31, 2021 and 2020, the Company’s natural gas production was in balance, meaning its cumulative portion of natural gas production taken and sold from wells in which it has an interest equaled its entitled interest in natural gas production from those wells.
Concentrations of Market, Credit and Other Risks	Concentrations of Market, Credit Risk and Other Risks The future results of the Company’s crude oil and natural gas operations will be affected by the market prices of crude oil and natural gas. The availability of a ready market for crude oil and natural gas products in the future will depend on numerous factors beyond the control of the Company, including weather, imports, marketing of competitive fuels, proximity and capacity of crude oil and natural gas pipelines and other transportation facilities, any oversupply or undersupply of crude oil, natural gas and liquid products, economic disruptions resulting from the COVID-19 pandemic, the regulatory environment, the economic environment, and other regional and political events, none of which can be predicted with certainty. The Company operates in the exploration, development and production sector of the crude oil and natural gas industry. The Company’s receivables include amounts due, indirectly via the third-party operators of the wells, from purchasers of its crude oil and natural gas production. While certain of these customers, as well as third-party operators of the wells, are affected by periodic downturns in the economy in general or in their specific segment of the crude oil or natural gas industry, the Company believes that its level of credit-related losses due to such economic fluctuations have been immaterial. The Company faces concentration risk due to the fact that substantially all of its oil and natural gas properties are located in North Dakota, Montana and (after the closing of the Reliance Acquisition described in Note 12) Pennsylvania. As a result, the Company is disproportionately exposed to risks affecting these geographic areas of operations. The Company manages and controls market and counterparty credit risk. In the normal course of business, collateral is not required for financial instruments with credit risk. Financial instruments which potentially subject the Company to credit risk consist principally of temporary cash balances and derivative financial instruments. The Company maintains cash and cash equivalents in bank deposit accounts which, at times, may exceed the federally insured limits. The Company has not experienced any significant losses from such investments. The Company attempts to limit the amount of credit exposure to any one financial institution or company. The Company believes the credit quality of its counterparties is generally high. In the normal course of business, letters of credit or parent guarantees may be required for counterparties which management perceives to have a higher credit risk.
Net Income (Loss) Per Common Share	Net Income (Loss) Per Common ShareBasic earnings per share (“EPS”) are computed by dividing net income (loss) attributable to common stockholders (the numerator) by the weighted average number of common shares outstanding for the period (the denominator). Diluted EPS is computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares and potential common shares outstanding (if dilutive) during each period. Potential common shares include shares issuable upon exercise of stock options or warrants and vesting of restricted stock awards, and shares issuable upon conversion of the Series A Preferred Stock (see Note 5). The number of potential common shares outstanding are calculated using the treasury stock or if-converted method.
Fair Value	Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The Company uses a fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value which are the following: Level 1 - Quoted prices in active markets for identical assets or liabilities. Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Financial Assets and Liabilities Commodity Derivatives. The Level 2 instruments presented in the tables above consist of commodity derivative instruments (see Note 11). The fair value of the Company’s commodity derivative instruments is determined based upon future prices, volatility and time to maturity, among other things. Counterparty statements are utilized to determine the value of the commodity derivative instruments and are reviewed and corroborated using various methodologies and significant observable inputs. The Company’s and the counterparties’ nonperformance risk is evaluated. The fair value of commodity derivative contracts is reflected in the condensed balance sheet. The current derivative asset and liability amounts represent the fair values expected to be settled in the subsequent twelve months. Interest Rate Derivatives. The Level 2 instruments presented in the tables above consist of interest rate derivative instruments (see Note 11). The fair value of the Company’s interest rate derivative instruments is determined based upon contracted notional amounts, active market-quoted LIBOR yield curves, and time to maturity, among other things. Counterparty statements are utilized to determine the value of the interest rate derivative instruments and are reviewed and corroborated using various methodologies and significant observable inputs. The Company’s and the counterparties’ nonperformance risk is evaluated. The fair value of interest rate derivative contracts is reflected in the condensed balance sheet. The current derivative asset and liability amounts represent the fair values expected to be settled in the subsequent twelve months.
Derivative Instruments and Price Risk Management	The Company utilizes commodity price swaps, basis swaps, swaptions and call options to (i) reduce the effects of volatility in price changes on the crude oil and natural gas commodities it produces and sells, (ii) reduce commodity price risk and (iii) provide a base level of cash flow in order to assure it can execute at least a portion of its capital spending. In addition, from time to time the Company utilizes interest rate swaps to mitigate exposure to changes in interest rates on the Company’s variable-rate indebtedness. All derivative instruments are recorded in the Company’s balance sheet as either assets or liabilities measured at their fair value (see Note 10). The Company has not designated any derivative instruments as hedges for accounting purposes and does not enter into such instruments for speculative trading purposes. If a derivative does not qualify as a hedge or is not designated as a hedge, the changes in the fair value are recognized in the Company’s condensed statements of operations as a gain or loss on derivative instruments. Mark-to-market gains and losses represent changes in fair values of derivatives that have not been settled. The Company’s cash flow is only impacted when the actual settlements under the derivative contracts result in making or receiving a payment to or from the counterparty. These cash settlements represent the cumulative gains and losses on the Company’s derivative instruments for the periods presented and do not include a recovery of costs that were paid to acquire or modify the derivative instruments that were settled. The Company has master netting agreements on individual derivative instruments with certain counterparties and therefore the current asset and liability are netted in the balance sheet and the non-current asset and liability are netted in the balance sheet for contracts with these counterparties.

BASIS OF PRESENTATION AND SIG_3

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Reconciliation of denominators used to calculate basic and diluted EPS	The reconciliation of the denominators used to calculate basic EPS and diluted EPS for the three months ended March 31, 2021 and 2020 are as follows: Three Months Ended (In thousands, except share and per share data) 2021 2020 Net Income (Loss) $ (90,357) $ 368,286 Less: Cumulative Dividends on Preferred Stock (3,830) (3,729) Net Income (Loss) Attributable to Common Stock $ (94,188) $ 364,557 Weighted Average Common Shares Outstanding: Weighted Average Common Shares Outstanding – Basic 54,538,099 40,366,253 Plus: Dilutive Effect of Restricted Stock — 35,470 Plus: Dilutive Effect of Preferred Shares — 9,319,541 Weighted Average Common Shares Outstanding – Diluted 54,538,099 49,721,264 Net Income (Loss) per Common Share: Basic $ (1.73) $ 9.03 Diluted $ (1.73) $ 7.33 Shares Excluded from EPS Due to Anti-Dilutive Effect: Restricted Stock 120,039 143,818 Preferred Stock 9,881,580 —
Supplemental cash flow activity	The following reflects the Company’s supplemental cash flow information: Three Months Ended March 31, (In thousands) 2021 2020 Supplemental Cash Items: Cash Paid During the Period for Interest, Net of Amount Capitalized $ 12,525 $ 15,990 Cash Paid During the Period for Income Taxes — — Non-cash Investing Activities: Oil and Natural Gas Properties Included in Accounts Payable and Accrued Liabilities 91,072 143,220 Capitalized Asset Retirement Obligations 205 259 Compensation Capitalized on Oil and Gas Properties 147 184 Non-cash Financing Activities: Issuance of Preferred Stock for 2L Notes Repurchase — 81,212

LONG-TERM DEBT (Tables)

LONG-TERM DEBT (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Schedule of long-term debt instruments	The Company’s long-term debt consisted of the following as of the dates indicated: (In thousands) March 31, 2021 December 31, 2020 Revolving Credit Facility $ 263,000 $ 532,000 Unsecured Notes due 2028 550,000 — Second Lien Notes due 2023 15,669 287,755 Unsecured VEN Bakken Note due 2022 — 130,000 Total principal 828,669 949,755 Unamortized debt discounts and premiums 140 2,041 Unamortized debt issuance costs (1) (11,748) (6,953) Total debt 817,061 944,843 Less current portion of long-term debt — (65,000) Total long-term debt $ 817,061 $ 879,843 ________________ (1) Debt issuance costs related to the Company’s revolving credit facility of $6.1 million and $6.5 million as of March 31, 2021 and December 31, 2020, respectively, are recorded in “Other Noncurrent Assets, Net” on the balance sheets.

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Summary of Outstanding RSAs and Related Activity	The following table reflects the outstanding RSAs and activity related thereto for the three months ended March 31, 2021: Service-based Awards Service and Performance-based Awards Service and Market-based Awards Service, Performance, and Market-based Awards Number of Shares Weighted-average Grant Date Fair Value Number of Shares Weighted-average Grant Date Fair Value Number of Shares Weighted-average Grant Date Fair Value Number of Shares Weighted-average Grant Date Fair Value Outstanding at December 31, 2020 268,602 $ 10.44 16,250 $ 27.00 5,245 $ 16.70 39,200 $ 9.80 Shares granted 138,297 11.76 — — — — — — Shares forfeited — — — — — — — — Shares vested (91,071) 10.60 (16,250) 27.00 (5,245) 16.70 (19,600) 9.80 Outstanding at March 31, 2021 315,828 $ 10.97 — $ — — $ — 19,600 $ 9.80

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Financial instruments measured at fair value on recurring basis	The following tables set forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of March 31, 2021 and December 31, 2020: Fair Value Measurements at March 31, 2021 Using (In thousands) Quoted Prices In Active Markets for Identical Assets (Liabilities) Significant Other Observable Inputs Significant Unobservable Inputs Commodity Derivatives – Current Assets $ — $ 2,005 $ — Commodity Derivatives – Noncurrent Assets — 356 — Commodity Derivatives – Current Liabilities — (34,508) — Commodity Derivatives – Noncurrent Liabilities — (61,808) — Interest Rate Derivatives – Current Liabilities — (600) — Interest Rate Derivatives – Noncurrent Liabilities — (179) — Total $ — $ (94,734) $ — Fair Value Measurements at December 31, 2020 Using (In thousands) Quoted Prices In Active Markets for Identical Assets (Liabilities) Significant Other Observable Inputs Significant Unobservable Inputs Commodity Derivatives – Current Assets $ — $ 51,290 $ — Commodity Derivatives – Current Liabilities — (2,504) — Commodity Derivatives – Noncurrent Assets — 111 — Commodity Derivatives – Noncurrent Liabilities — (14,214) — Interest Rate Derivatives – Current Liabilities — (574) — Interest Rate Derivatives – Noncurrent Liabilities — (445) — Total $ — $ 33,664 $ —

DERIVATIVE INSTRUMENTS AND PR_2

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of non-cash gains or losses on derivative contracts	The following table presents settlements on commodity derivative instruments and unsettled gains and losses on open commodity derivative instruments for the periods presented which is recorded in the revenue section of our condensed financial statements: Three Months Ended (In thousands) 2021 2020 Gain (Loss) on Settled Commodity Derivatives $ (7,297) $ 31,506 Gain (Loss) on Unsettled Commodity Derivatives (128,638) 345,075 Gain (Loss) on Commodity Derivatives, Net $ (135,935) $ 376,581
Schedule of derivative positions	The following table summarizes open commodity derivative positions as of March 31, 2021, for commodity derivatives that were entered into through March 31, 2021, for the settlement period presented: 2021 2022 2023 2024 Oil: WTI NYMEX - Swaps: Volume (Bbl) 6,350,574 4,218,250 112,500 — Weighted-Average Price ($/Bbl) $ 54.80 $ 51.66 $ 51.65 $ — WTI NYMEX - Swaptions (1) : Volume (Bbl) — 1,496,125 3,691,000 — Weighted-Average Price ($/Bbl) $ — $ 50.13 $ 50.31 $ — Bakken Crude UHC to WTI NYMEX - Basis Swaps: Volume (Bbl) 4,155,800 — — — Weighted-Average Price ($/Bbl) $ (2.40) $ — $ — $ — WTI NYMEX - Call Options (1) : Volume (Bbl) — — 365,000 1,275,000 Weighted-Average Price ($/Bbl) $ — $ — $ 55.00 $ 52.89 Natural Gas: Henry Hub NYMEX - Swaps: Volume (MMBtu) 22,637,745 5,450,000 — — Weighted-Average Price ($/MMBtu) $ 2.81 $ 2.80 $ — $ — Waha Inside FERC to Henry Hub - Basis Swaps: Volume (MMBtu) 69,000 — — — Weighted-Average Differential ($/MMBtu) $ (0.28) $ — $ — $ — Columbia/TCO-POOL - Basis Swaps: Volume (MMBtu) 1,959,697 1,067,187 — — Weighted-Average Differential ($/MMBtu) $ (0.45) $ (0.43) $ — $ — Dominion - App - Basis Swaps: Volume (MMBtu) 653,232 355,729 — — Weighted-Average Differential ($/MMBtu) $ (0.64) $ (0.64) $ — $ — NE - TETCO M2 - Basis Swaps: Volume (MMBtu) 3,919,394 2,134,374 — — Weighted-Average Differential ($/MMBtu) $ (0.68) $ (0.71) $ — $ — NGL: TET-OPIS - Swaps: Volume (Bbl) 92,000 — — — Weighted-Average Price ($/Bbl) $ 34.34 $ — $ — $ — ______________
Summary of open commodity derivative financial instruments	The following table sets forth the amounts, on a gross basis, and classification of the Company’s outstanding derivative financial instruments at March 31, 2021 and December 31, 2020, respectively. Certain amounts may be presented on a net basis on the condensed financial statements when such amounts are with the same counterparty and subject to a master netting arrangement. Type of Commodity Balance Sheet Location March 31, 2021 Estimated Fair Value December 31, 2020 Estimated Fair Value Derivative Assets: (In thousands) Commodity Price Swap Contracts Current Assets $ 6,390 $ 52,702 Commodity Basis Swap Contracts Current Assets 325 37 Commodity Price Swaptions Contracts Current Assets 246 — Commodity Price Swap Contracts Noncurrent Assets 1,478 3,479 Commodity Price Swaptions Contracts Noncurrent Assets 749 — Interest Rate Swap Contracts Noncurrent Assets 5 — Total Derivative Assets $ 9,193 $ 56,218 Derivative Liabilities: Commodity Price Swap Contracts Current Liabilities $ (29,497) $ (3,434) Commodity Basis Swap Contracts Current Liabilities (6,367) (519) Commodity Price Swaptions Contracts Current Liabilities (3,601) — Interest Rate Swap Contracts Current Liabilities (599) (574) Commodity Price Swap Contracts Noncurrent Liabilities (8,381) (399) Interest Rate Swap Contracts Noncurrent Liabilities (184) (445) Commodity Price Call Option Contracts Noncurrent Liabilities (12,222) — Commodity Price Swaptions Contracts Noncurrent Liabilities (43,076) (17,184) Total Derivative Liabilities $ (103,927) $ (22,554) Estimated Fair Value at March 31, 2021 (In thousands) Gross Amounts of Gross Amounts Offset Net Amounts of Assets (Liabilities) Presented in the Balance Sheet Offsetting of Derivative Assets: Current Assets $ 6,961 $ (4,956) $ 2,005 Non-Current Assets 2,232 (1,876) 356 Total Derivative Assets $ 9,193 $ (6,833) $ 2,360 Offsetting of Derivative Liabilities: Current Liabilities $ (40,064) $ 4,956 $ (35,108) Non-Current Liabilities (63,863) 1,876 (61,987) Total Derivative Liabilities $ (103,927) $ 6,833 $ (97,094) Estimated Fair Value at December 31, 2020 (In thousands) Gross Amounts of Gross Amounts Offset Net Amounts of Assets (Liabilities) Presented in the Balance Sheet Offsetting of Derivative Assets: Current Assets $ 52,739 $ (1,449) $ 51,290 Non-Current Assets 3,479 (3,369) 111 Total Derivative Assets $ 56,218 $ (4,817) $ 51,401 Offsetting of Derivative Liabilities: Current Liabilities $ (4,527) $ 1,449 $ (3,078) Non-Current Liabilities (18,028) 3,369 (14,659) Total Derivative Liabilities $ (22,554) $ 4,817 $ (17,737)

BASIS OF PRESENTATION AND SIG_4

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	Sep. 18, 2020	Mar. 31, 2021USD ($)revenue_sourcegeographic_area	Mar. 31, 2020USD ($)
Accounting Policies [Line Items]
Reverse stock split ratio	0.1
Number of revenue sources | revenue_source		2
Number of geographic areas in which entity operates | geographic_area		1
Oil
Accounting Policies [Line Items]
Sales		$ 135,600	$ 116,300
Natural Gas and NGL
Accounting Policies [Line Items]
Sales		21,700	13,900
Oil and Gas Sales
Accounting Policies [Line Items]
Sales		$ 157,331	$ 130,196
Oil and Gas Sales | Sales | Operator Concentration Risk | Top Four Operators
Accounting Policies [Line Items]
Concentration risk percentage		55.00%	53.00%

BASIS OF PRESENTATION AND SIG_5

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of EPS (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Income (Loss)		$ (90,357)	$ 368,286
Less: Cumulative Dividends on Preferred Stock		(3,830)	(3,729)
Net Income (Loss) Attributable to Common Stockholders		$ (94,188)	$ 364,557
Weighted Average Common Shares Outstanding:
Weighted Average Shares Outstanding - Basic (in shares)	[1]	54,538,099	40,366,253
Plus: Dilutive Effect of Restricted Stock (in shares)		0	35,470
Plus: Dilutive Effect of Preferred Shares (in shares)		0	9,319,541
Weighted Average Common Shares Outstanding – Diluted (in shares)	[1]	54,538,099	49,721,264
Net Income (Loss) per Common Share:
Basic (in dollars per share)	[1]	$ (1.73)	$ 9.03
Diluted (in dollars per share)	[1]	$ (1.73)	$ 7.33
Restricted Stock
Net Income (Loss) per Common Share:
Shares underlying Restricted Stock Awards Excluded from EPS Due to Anti-Dilutive Effect (in shares)		120,039	143,818
Preferred Stock
Net Income (Loss) per Common Share:
Shares underlying Restricted Stock Awards Excluded from EPS Due to Anti-Dilutive Effect (in shares)		9,881,580	0
[1]	Adjusted for the 1-for-10 reverse stock split.

BASIS OF PRESENTATION AND SIG_6

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Supplemental Cash Items:
Cash Paid During the Period for Interest, Net of Amount Capitalized	$ 12,525	$ 15,990
Cash Paid During the Period for Income Taxes	0	0
Non-cash Investing Activities:
Oil and Natural Gas Properties Included in Accounts Payable and Accrued Liabilities	91,072	143,220
Capitalized Asset Retirement Obligations	205	259
Compensation Capitalized on Oil and Gas Properties	147	184
Preferred Stock
Non-cash Financing Activities:
Issuance of Stock	$ 0	$ 81,212

CRUDE OIL AND NATURAL GAS PRO_2

CRUDE OIL AND NATURAL GAS PROPERTIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Asset Acquisition [Line Items]
Impairment of its proved oil and gas properties	$ 0	$ 0
Anticipated future period over which excluded costs will become subject to depletion	5 years
Leases expired	$ 0.2	1.7
Independent Transactions
Asset Acquisition [Line Items]
Consideration transferred	4.4	25.5
Development costs incurred prior to closing	$ 1.8	$ 18.4

LONG-TERM DEBT - Schedule of De

LONG-TERM DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Principal Balance	$ 828,669	$ 949,755
Unamortized debt discounts and premiums	140	2,041
Unamortized debt issuance costs	(11,748)	(6,953)
Total debt	817,061	944,843
Less current portion of long-term debt	0	(65,000)
Total long-term debt	817,061	879,843
Unsecured Notes due 2028 | Unsecured Debt
Debt Instrument [Line Items]
Principal Balance	550,000	0
Second Lien Notes due 2023 | Second Lien Notes
Debt Instrument [Line Items]
Principal Balance	15,669	287,755
Unsecured VEN Bakken Note due 2022 | Unsecured Debt
Debt Instrument [Line Items]
Principal Balance	0	130,000
Revolving Credit Facility
Debt Instrument [Line Items]
Principal Balance	263,000	532,000
Revolving Credit Facility | Other Noncurrent Assets, Net
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ (6,100)	$ (6,500)

LONG-TERM DEBT - Narrative (Det

LONG-TERM DEBT - Narrative (Details)

Feb. 18, 2021USD ($)

Jan. 04, 2021USD ($)

Nov. 22, 2019USD ($)

Jul. 01, 2019USD ($)

Mar. 31, 2021USD ($)

Mar. 31, 2020USD ($)

Dec. 31, 2020USD ($)

Dec. 31, 2019USD ($)

Nov. 30, 2019USD ($)

Oct. 31, 2018USD ($)

May 31, 2018USD ($)

May 15, 2018

Debt Instrument [Line Items]

Proceeds from issuance of common stock

$ 132,900,000

$ 0

Long-term debt, gross

828,669,000

$ 949,755,000

Long-term debt

817,061,000

944,843,000

Revolving Credit Facility

Debt Instrument [Line Items]

Long-term debt, gross

263,000,000

532,000,000

Borrowing base

$ 660,000,000

Maximum debt to EBITDAX ratio under debt covenant

3.50

Minimum current ratio under debt covenant

1

Minimum percent of the fair value of reserves secured by mortgages

90.00%

Revolving Credit Facility | Federal funds effective rate

Debt Instrument [Line Items]

Basis spread on variable rate

0.50%

Revolving Credit Facility | LIBOR

Debt Instrument [Line Items]

Basis spread on variable rate

1.00%

Revolving Credit Facility | LIBOR | Minimum

Debt Instrument [Line Items]

Basis spread on variable rate

2.00%

Revolving Credit Facility | LIBOR | Maximum

Debt Instrument [Line Items]

Basis spread on variable rate

3.00%

Revolving Credit Facility | Base rate | Minimum

Debt Instrument [Line Items]

Basis spread on variable rate

1.00%

Revolving Credit Facility | Base rate | Maximum

Debt Instrument [Line Items]

Basis spread on variable rate

2.00%

Unsecured Debt | VEN Bakken LLC

Debt Instrument [Line Items]

Interest rate

6.00%

Unsecured Notes due 2028 | Unsecured Debt

Debt Instrument [Line Items]

Principal amount

$ 550,000,000

$ 550,000,000

Interest rate

8.125%

8.125%

Proceeds from the issuance of long-term debt

$ 538,400,000

Long-term debt, gross

550,000,000

0

Default period

30 days

Acceleration threshold amount

$ 35,000,000

Judgment discharge or stay period

60 days

Unsecured Notes due 2028 | Unsecured Debt | Redemption Period 1

Debt Instrument [Line Items]

Redemption price, percentage of principal amount repurchased

100.00%

Unsecured Notes due 2028 | Unsecured Debt | Redemption Period 2

Debt Instrument [Line Items]

Redemption price percentage

104.063%

Unsecured Notes due 2028 | Unsecured Debt | Redemption Period 3

Debt Instrument [Line Items]

Redemption price percentage

102.031%

Unsecured Notes due 2028 | Unsecured Debt | Redemption Period 4

Debt Instrument [Line Items]

Redemption price percentage

100.00%

Unsecured VEN Bakken Note due 2022 | VEN Bakken LLC

Debt Instrument [Line Items]

Interest rate

6.00%

Percent of principal

50.00%

Unsecured VEN Bakken Note due 2022 | Unsecured Debt

Debt Instrument [Line Items]

Principal amount

$ 130,000,000

Long-term debt, gross

0

130,000,000

Repayments of long-term debt

$ 65,000,000

$ 65,000,000

Second Lien Notes due 2023 | Second Lien Notes

Debt Instrument [Line Items]

Interest rate

8.50%

Long-term debt, gross

15,669,000

287,755,000

Additional face amount issued

$ 350,000,000

Second Lien Notes due 2023 | Second Lien Notes | Exchange Agreement

Debt Instrument [Line Items]

Principal amount

$ 344,300,000

Additional face amount issued

4,300,000

Long-term debt

15,700,000

Second Lien Notes due 2023 | Second Lien Notes | Cash Tender Offer

Debt Instrument [Line Items]

Aggregate principal amount of debt repurchased and retired

272,100,000

13,500,000

$ 200,000,000

Cost of redemption and retirement of debt, including premiums

$ 280,200,000

Second Lien Notes due 2023 | Second Lien Notes | Open Market Transactions

Debt Instrument [Line Items]

Aggregate principal amount of debt repurchased and retired

$ 10,100,000

Second Lien Notes due 2023 | Second Lien Notes | Exchange for Shares of Series A Preferred Stock

Debt Instrument [Line Items]

Aggregate principal amount of debt repurchased and retired

$ 116,500,000

$ 70,800,000

8.000% Senior Notes due 2020 | Unsecured Debt

Debt Instrument [Line Items]

Interest rate

8.00%

COMMON AND PREFERRED STOCK (Det

COMMON AND PREFERRED STOCK (Details)	Apr. 23, 2021USD ($)$ / shares	Feb. 09, 2021USD ($)$ / sharesshares	Sep. 18, 2020shares	Mar. 31, 2021USD ($)payment$ / sharesshares		Mar. 31, 2020USD ($)shares	Dec. 31, 2020$ / sharesshares		Sep. 17, 2020$ / shares	May 31, 2011USD ($)
Class of Stock [Line Items]
Reverse stock split ratio			0.1
Common stock, shares issued (in shares)			44,663,990	60,361,547
Common stock, shares authorized (in shares)			135,000,000	135,000,000	[1]		135,000,000	[1]
Common stock, par value (in dollars per share) | $ / shares				$ 0.001	[1]		$ 0.001	[1]	$ 0.001
Common stock, shares outstanding (in shares)			44,663,990	60,361,547	[1]		45,908,779	[1]
Preferred stock, shares authorized (in shares)				5,000,000			5,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.001			$ 0.001
Preferred stock, shares outstanding (in shares)				2,218,732			2,218,732
Proceeds from issuance of common stock | $				$ 132,900,000		$ 0
Stock repurchase program, amount approved | $										$ 150,000,000
Stock repurchased (in shares)				0		0
Underwritten Public Offering
Class of Stock [Line Items]
Proceeds from issuance of common stock | $		$ 132,900,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)				5,000,000
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.001
Preferred stock, shares issued (in shares)				2,218,732
Preferred stock, shares outstanding (in shares)				2,218,732
Preferred stock, dividend rate				6.50%
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares				$ 100
Amount of undeclared accumulated preferred stock dividends | $				$ 20,100,000
Convertible preferred stock coversion ratio			4.363	4.363					43.63
Conversion price (in dollars per share) | $ / shares				$ 22.92
Threshold of common stock price as a percent of conversion price triggering conversion				145.00%
Threshold trading days at which conversion occurs				20 days
Conversion trading days window				30 days
Number of annual dividend payments | payment				8
Series A Preferred Stock | Subsequent Event
Class of Stock [Line Items]
Dividends per share (in dollars per share) | $ / shares	$ 9.9163
Aggregate dividend amount | $	$ 22,000,000
Common Stock
Class of Stock [Line Items]
Common stock surrendered by certain employees to cover tax obligations (shares)				60,529
Fair value of common stock surrendered by certain employees to cover tax obligations | $				$ 800,000
Common Stock | Underwritten Public Offering
Class of Stock [Line Items]
Number of shares issued in transaction (in shares)		14,375,000
Sale of stock, price per share (dollars per share) | $ / shares		$ 9.75
[1]	Adjusted for the 1-for-10 reverse stock split.

STOCK-BASED COMPENSATION - Narr

STOCK-BASED COMPENSATION - Narrative (Details) $ in Millions	Sep. 18, 2020	Mar. 31, 2021USD ($)shares	Mar. 31, 2020USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reverse stock split ratio	0.1
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense		$ 3.8
Unrecognized compensation expense, recognized period		1 year 2 months 12 days
Fair value of vested awards		$ 1.8	$ 1.2
Restricted Stock Awards | Employees and Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Restricted Stock Awards | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		1 year
2018 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future awards (shares) | shares		769,755

STOCK-BASED COMPENSATION - Summ

STOCK-BASED COMPENSATION - Summary of Outstanding RSAs and Related Activity (Details)	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Service-based Awards
Number of Shares
Outstanding, beginning (shares) | shares	268,602
Granted (shares) | shares	138,297
Forfeited (shares) | shares	0
Vested (shares) | shares	(91,071)
Outstanding, ending (shares) | shares	315,828
Weighted-Average Grant Date Fair Value (per Award)
Outstanding, beginning (dollars per share) | $ / shares	$ 10.44
Shares Granted (dollars per share) | $ / shares	11.76
Shares Forfeited (dollars per share) | $ / shares	0
Vested (dollars per share) | $ / shares	10.60
Outstanding, ending (dollars per share) | $ / shares	$ 10.97
Service and Performance-based Awards
Number of Shares
Outstanding, beginning (shares) | shares	16,250
Granted (shares) | shares	0
Forfeited (shares) | shares	0
Vested (shares) | shares	(16,250)
Outstanding, ending (shares) | shares	0
Weighted-Average Grant Date Fair Value (per Award)
Outstanding, beginning (dollars per share) | $ / shares	$ 27
Shares Granted (dollars per share) | $ / shares	0
Shares Forfeited (dollars per share) | $ / shares	0
Vested (dollars per share) | $ / shares	27
Outstanding, ending (dollars per share) | $ / shares	$ 0
Service and Market-based Awards
Number of Shares
Outstanding, beginning (shares) | shares	5,245
Granted (shares) | shares	0
Forfeited (shares) | shares	0
Vested (shares) | shares	(5,245)
Outstanding, ending (shares) | shares	0
Weighted-Average Grant Date Fair Value (per Award)
Outstanding, beginning (dollars per share) | $ / shares	$ 16.70
Shares Granted (dollars per share) | $ / shares	0
Shares Forfeited (dollars per share) | $ / shares	0
Vested (dollars per share) | $ / shares	16.70
Outstanding, ending (dollars per share) | $ / shares	$ 0
Service, Performance, and Market-based Awards
Number of Shares
Outstanding, beginning (shares) | shares	39,200
Granted (shares) | shares	0
Forfeited (shares) | shares	0
Vested (shares) | shares	(19,600)
Outstanding, ending (shares) | shares	19,600
Weighted-Average Grant Date Fair Value (per Award)
Outstanding, beginning (dollars per share) | $ / shares	$ 9.80
Shares Granted (dollars per share) | $ / shares	0
Shares Forfeited (dollars per share) | $ / shares	0
Vested (dollars per share) | $ / shares	9.80
Outstanding, ending (dollars per share) | $ / shares	$ 9.80

COMMITMENTS & CONTINGENCIES (De

COMMITMENTS & CONTINGENCIES (Details) $ in Millions	Mar. 31, 2021USD ($)
Other Noncurrent Assets, Net
Loss Contingencies [Line Items]
Loss contingency accounts receivable	$ 4.3

FAIR VALUE - Assets and Liabili

FAIR VALUE - Assets and Liabilities Accounted For At Fair Value On A Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	$ 0	$ 0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	(94,734)	33,664
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Current Asset | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Current Asset | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	2,005	51,290
Commodity Contract | Current Asset | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Noncurrent Asset | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Noncurrent Asset | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	356	111
Commodity Contract | Noncurrent Asset | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Current Liabilities | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Current Liabilities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	(34,508)	(2,504)
Commodity Contract | Current Liabilities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Noncurrent Liabilities | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Commodity Contract | Noncurrent Liabilities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	(61,808)	(14,214)
Commodity Contract | Noncurrent Liabilities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Interest Rate Contract | Current Liabilities | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Interest Rate Contract | Current Liabilities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	(600)	(574)
Interest Rate Contract | Current Liabilities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Interest Rate Contract | Noncurrent Liabilities | Quoted Prices In Active Markets for Identical Assets (Liabilities) (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	0	0
Interest Rate Contract | Noncurrent Liabilities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	(179)	(445)
Interest Rate Contract | Noncurrent Liabilities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets (liabilities)	$ 0	$ 0

FAIR VALUE - Narrative (Details

FAIR VALUE - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Asset retirement obligations incurred and acquired	$ 0.2
Second Lien Notes due 2023 | Estimated Fair Value | Second Lien Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	16	$ 256.1
Unsecured Notes due 2028 | Estimated Fair Value | Unsecured Debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of long-term debt	$ 547.3

DERIVATIVE INSTRUMENTS AND PR_3

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Gains/Losses on Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gain (Loss) on Settled Commodity Derivatives	$ (7,297)	$ 31,506
Gain (Loss) on Unsettled Commodity Derivatives	(128,638)	345,075
Gain (Loss) on Commodity Derivatives, Net	$ (135,935)	$ 376,581

DERIVATIVE INSTRUMENTS AND PR_4

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Summary of Open Commodity Derivative Positions (Details)	Mar. 31, 2021MMBTUbbl$ / MMBTU$ / bbl
WTI NYMEX - Swaps | 2021
Derivative [Line Items]
Volume | bbl	6,350,574
Weighted average price (in dollars per unit) | $ / bbl	54.80
WTI NYMEX - Swaps | 2022
Derivative [Line Items]
Volume | bbl	4,218,250
Weighted average price (in dollars per unit) | $ / bbl	51.66
WTI NYMEX - Swaps | 2023
Derivative [Line Items]
Volume | bbl	112,500
Weighted average price (in dollars per unit) | $ / bbl	51.65
WTI NYMEX - Swaps | 2024
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
WTI NYMEX - Swaptions | 2021
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
WTI NYMEX - Swaptions | 2022
Derivative [Line Items]
Volume | bbl	1,496,125
Weighted average price (in dollars per unit) | $ / bbl	50.13
WTI NYMEX - Swaptions | 2023
Derivative [Line Items]
Volume | bbl	3,691,000
Weighted average price (in dollars per unit) | $ / bbl	50.31
WTI NYMEX - Swaptions | 2024
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
Bakken Crude UHC To WTI NYMEX - Basis Swaps | 2021
Derivative [Line Items]
Volume | bbl	4,155,800
Weighted average price (in dollars per unit) | $ / bbl	(2.40)
Bakken Crude UHC To WTI NYMEX - Basis Swaps | 2022
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
Bakken Crude UHC To WTI NYMEX - Basis Swaps | 2023
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
Bakken Crude UHC To WTI NYMEX - Basis Swaps | 2024
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
WTI NYMEX - Call Options | 2021
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
WTI NYMEX - Call Options | 2022
Derivative [Line Items]
Volume | bbl	0
Weighted average price (in dollars per unit) | $ / bbl	0
WTI NYMEX - Call Options | 2023
Derivative [Line Items]
Volume | bbl	365,000
Weighted average price (in dollars per unit) | $ / bbl	55
WTI NYMEX - Call Options | 2024
Derivative [Line Items]
Volume | bbl	1,275,000
Weighted average price (in dollars per unit) | $ / bbl	52.89
Henry Hub NYMEX - Swaps | 2021
Derivative [Line Items]
Volume	22,637,745
Weighted average price (in dollars per unit) | $ / MMBTU	2.81
Henry Hub NYMEX - Swaps | 2022
Derivative [Line Items]
Volume	5,450,000
Weighted average price (in dollars per unit) | $ / MMBTU	2.80
Henry Hub NYMEX - Swaps | 2023
Derivative [Line Items]
Volume	0
Weighted average price (in dollars per unit) | $ / MMBTU	0
Henry Hub NYMEX - Swaps | 2024
Derivative [Line Items]
Volume	0
Weighted average price (in dollars per unit) | $ / MMBTU	0
Waha Inside FERC to Henry Hub - Basis Swaps | 2021
Derivative [Line Items]
Volume	69,000
Weighted average differential (in dollars per unit) | $ / bbl	(0.28)
Waha Inside FERC to Henry Hub - Basis Swaps | 2022
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / bbl	0
Waha Inside FERC to Henry Hub - Basis Swaps | 2023
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / bbl	0
Waha Inside FERC to Henry Hub - Basis Swaps | 2024
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / bbl	0
Columbia/TCO-POOL - Basis Swaps | 2021
Derivative [Line Items]
Volume	1,959,697
Weighted average differential (in dollars per unit) | $ / MMBTU	(0.45)
Columbia/TCO-POOL - Basis Swaps | 2022
Derivative [Line Items]
Volume	1,067,187
Weighted average differential (in dollars per unit) | $ / MMBTU	(0.43)
Columbia/TCO-POOL - Basis Swaps | 2023
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / MMBTU	0
Columbia/TCO-POOL - Basis Swaps | 2024
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / MMBTU	0
Dominion - App - Basis Swaps | 2021
Derivative [Line Items]
Volume	653,232
Weighted average differential (in dollars per unit) | $ / MMBTU	(0.64)
Dominion - App - Basis Swaps | 2022
Derivative [Line Items]
Volume	355,729
Weighted average differential (in dollars per unit) | $ / MMBTU	(0.64)
Dominion - App - Basis Swaps | 2023
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / MMBTU	0
Dominion - App - Basis Swaps | 2024
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / MMBTU	0
NE - TETCO M2 - Basis Swaps | 2021
Derivative [Line Items]
Volume	3,919,394
Weighted average differential (in dollars per unit) | $ / MMBTU	(0.68)
NE - TETCO M2 - Basis Swaps | 2022
Derivative [Line Items]
Volume	2,134,374
Weighted average differential (in dollars per unit) | $ / MMBTU	(0.71)
NE - TETCO M2 - Basis Swaps | 2023
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / MMBTU	0
NE - TETCO M2 - Basis Swaps | 2024
Derivative [Line Items]
Volume	0
Weighted average differential (in dollars per unit) | $ / MMBTU	0
TET-OPIS - Swaps | 2021
Derivative [Line Items]
Volume	92,000
Weighted average price (in dollars per unit) | $ / MMBTU	34.34
TET-OPIS - Swaps | 2022
Derivative [Line Items]
Volume	0
Weighted average price (in dollars per unit) | $ / MMBTU	0
TET-OPIS - Swaps | 2023
Derivative [Line Items]
Volume	0
Weighted average price (in dollars per unit) | $ / MMBTU	0
TET-OPIS - Swaps | 2024
Derivative [Line Items]
Volume	0
Weighted average price (in dollars per unit) | $ / MMBTU	0

DERIVATIVE INSTRUMENTS AND PR_5

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Narrative (Details) $ in Millions	Mar. 31, 2021USD ($)
Interest Rate Swap Contracts
Derivative [Line Items]
Notional amount	$ 200

DERIVATIVE INSTRUMENTS AND PR_6

DERIVATIVE INSTRUMENTS AND PRICE RISK MANAGEMENT - Classification of Outstanding Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Current Derivative Assets	$ 2,005	$ 51,290
Noncurrent Derivative Assets	356	111
Total derivative assets	9,193	56,218
Current liabilities	(35,108)	(3,078)
Noncurrent liabilities	(61,987)	(14,659)
Total derivative liabilities	(103,927)	(22,554)
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	9,193	56,218
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Assets	(6,833)	(4,817)
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Assets	2,360	51,401
Gross Amounts of Recognized Assets, Offsetting of Derivative Liabilities	(103,927)	(22,554)
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Liabilities	6,833	4,817
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Liabilities	(97,094)	(17,737)
Current Assets
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	6,961	52,739
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Assets	(4,956)	(1,449)
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Assets	2,005	51,290
Noncurrent Assets
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Offsetting of Derivative Assets	2,232	3,479
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Assets	(1,876)	(3,369)
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Assets	356	111
Current Liabilities
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Offsetting of Derivative Liabilities	(40,064)	(4,527)
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Liabilities	4,956	1,449
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Liabilities	(35,108)	(3,078)
Noncurrent Liabilities
Offsetting Assets [Line Items]
Gross Amounts of Recognized Assets, Offsetting of Derivative Liabilities	(63,863)	(18,028)
Gross Amounts Offset in the Balance Sheet, Offsetting of Derivative Liabilities	1,876	3,369
Net Amounts of Assets Presented in the Balance Sheet, Offsetting of Derivative Liabilities	(61,987)	(14,659)
Commodity Price Swap Contracts | Current Assets
Offsetting Assets [Line Items]
Current Derivative Assets	6,390	52,702
Commodity Price Swap Contracts | Noncurrent Assets
Offsetting Assets [Line Items]
Noncurrent Derivative Assets	1,478	3,479
Commodity Price Swap Contracts | Current Liabilities
Offsetting Assets [Line Items]
Current liabilities	(29,497)	(3,434)
Commodity Price Swap Contracts | Noncurrent Liabilities
Offsetting Assets [Line Items]
Noncurrent liabilities	(8,381)	(399)
Commodity Basis Swap Contracts | Current Assets
Offsetting Assets [Line Items]
Current Derivative Assets	325	37
Commodity Basis Swap Contracts | Current Liabilities
Offsetting Assets [Line Items]
Current liabilities	(6,367)	(519)
Commodity Price Swaptions Contracts | Current Assets
Offsetting Assets [Line Items]
Current Derivative Assets	246	0
Commodity Price Swaptions Contracts | Noncurrent Assets
Offsetting Assets [Line Items]
Noncurrent Derivative Assets	749	0
Commodity Price Swaptions Contracts | Current Liabilities
Offsetting Assets [Line Items]
Current liabilities	(3,601)	0
Commodity Price Swaptions Contracts | Noncurrent Liabilities
Offsetting Assets [Line Items]
Noncurrent liabilities	(43,076)	(17,184)
Interest Rate Swap Contracts | Noncurrent Assets
Offsetting Assets [Line Items]
Noncurrent Derivative Assets	5	0
Interest Rate Swap Contracts | Current Liabilities
Offsetting Assets [Line Items]
Current liabilities	(599)	(574)
Interest Rate Swap Contracts | Noncurrent Liabilities
Offsetting Assets [Line Items]
Noncurrent liabilities	(184)	(445)
Commodity Price Call Option Contracts | Noncurrent Liabilities
Offsetting Assets [Line Items]
Noncurrent liabilities	$ (12,222)	$ 0

SUBSEQUENT EVENT (Details)

SUBSEQUENT EVENT (Details) - Reliance - Subsequent Event $ / shares in Units, $ in Millions	Apr. 01, 2021USD ($)awell$ / sharesshares
Subsequent Event [Line Items]
Net producing wells acquired | well	95.3
Wells in progress acquired | well	24.9
Net acres acquired | a	61,712
Closing consideration paid | $	$ 120.9
Cash deposits previously paid | $	$ 17.5
Warrants issued as consideration (in shares) | shares	3,250,000
Warrant exercise price (in dollars per share) | $ / shares	$ 14