CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 12,158	$ 8,876
Accounts receivable	140,569	97,142
Commodity derivative assets	316	0
Prepaid expenses and other current assets	2,457	1,956
TOTAL CURRENT ASSETS	155,500	107,974
PROPERTY AND EQUIPMENT
Oil and natural gas properties, at cost, using the successful efforts method of accounting, includes unproved properties of $925,707 and $937,395 at June 30, 2022 and December 31, 2021, respectively	3,000,991	3,001,627
Accumulated depreciation, depletion, amortization, and impairment	(1,892,235)	(1,869,731)
Oil and natural gas properties, net	1,108,756	1,131,896
Other property and equipment, net of accumulated depreciation of $13,150 and $12,931 at June 30, 2022 and December 31, 2021, respectively	1,122	1,440
NET PROPERTY AND EQUIPMENT	1,109,878	1,133,336
DEFERRED CHARGES AND OTHER LONG-TERM ASSETS	7,315	6,611
TOTAL ASSETS	1,272,693	1,247,921
CURRENT LIABILITIES
Accounts payable	3,586	5,944
Accrued liabilities	13,103	17,589
Commodity derivative liabilities	106,080	51,544
Other current liabilities	2,048	2,063
TOTAL CURRENT LIABILITIES	124,817	77,140
LONG–TERM LIABILITIES
Credit facility	86,000	89,000
Accrued incentive compensation	1,063	838
Commodity derivative liabilities	3,422	2,001
Asset retirement obligations	12,599	12,561
Other long-term liabilities	2,104	2,752
TOTAL LIABILITIES	230,005	184,292
COMMITMENTS AND CONTINGENCIES (Note 7)
EQUITY
Partners' equity – general partner interest	0	0
TOTAL EQUITY	744,327	765,268
TOTAL LIABILITIES, MEZZANINE EQUITY, AND EQUITY	1,272,693	1,247,921
Series B Cumulative Convertible Preferred Units
MEZZANINE EQUITY
Partners' equity – Series B cumulative convertible preferred units, 14,711 units outstanding at June 30, 2022 and December 31, 2021, respectively	298,361	298,361
Common units
EQUITY
Partners' equity – common units, 209,399 and 208,666 units outstanding at June 30, 2022 and December 31, 2021, respectively	$ 744,327	$ 765,268