CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 4,307	$ 8,876
Accounts receivable	135,697	97,142
Commodity derivative assets	31,472	0
Prepaid expenses and other current assets	1,905	1,956
TOTAL CURRENT ASSETS	173,381	107,974
PROPERTY AND EQUIPMENT
Oil and natural gas properties, at cost, using the successful efforts method of accounting, includes unproved properties of $909,344 and $937,395 at December 31, 2022 and 2021, respectively	3,003,907	3,001,627
Accumulated depreciation, depletion, amortization, and impairment	(1,916,919)	(1,869,731)
Oil and natural gas properties, net	1,086,988	1,131,896
Other property and equipment, net of accumulated depreciation of $13,461 and $12,931 at December 31, 2022 and 2021, respectively	1,259	1,440
NET PROPERTY AND EQUIPMENT	1,088,247	1,133,336
DEFERRED CHARGES AND OTHER LONG-TERM ASSETS	9,454	6,611
TOTAL ASSETS	1,271,082	1,247,921
CURRENT LIABILITIES
Accounts payable	6,773	5,944
Accrued liabilities	19,729	17,589
Commodity derivative liabilities	3,243	51,544
Other current liabilities	989	2,063
TOTAL CURRENT LIABILITIES	30,734	77,140
LONG-TERM LIABILITIES
Credit facility	10,000	89,000
Accrued incentive compensation	1,884	838
Commodity derivative liabilities	16	2,001
Asset retirement obligations	15,030	12,561
Other long-term liabilities	3,606	2,752
TOTAL LIABILITIES	61,270	184,292
COMMITMENTS AND CONTINGENCIES (Note 11)
EQUITY
Partners' equity — general partner interest	0	0
TOTAL EQUITY	911,451	765,268
TOTAL LIABILITIES, MEZZANINE EQUITY, AND EQUITY	1,271,082	1,247,921
Series B Cumulative Convertible Preferred Units
MEZZANINE EQUITY
Partners' equity — Series B cumulative convertible preferred units, 14,711 and 14,711 units outstanding at December 31, 2022 and $2021, respectively	298,361	298,361
Common units
EQUITY
Partners' equity — common units, 209,407 and 208,666 units outstanding at December 31, 2022 and 2021, respectively	$ 911,451	$ 765,268