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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 22,325 $ 11,232
Trade and other receivables 10,145 5,075
Net profits interest receivable - related party 4,081 1,914
Total current assets 36,551 18,221
Property and leasehold improvements - at cost:    
Oil and natural gas properties (full cost method) 410,827 399,324
Accumulated full cost depletion (338,976) (331,361)
Total 71,851 67,963
Operating lease right-of-use asset 1,222 1,392
Total assets 110,306 88,327
Current liabilities:    
Accounts payable and other current liabilities 2,419 1,578
Operating lease liability 293 300
Total current liabilities 2,712 1,878
Operating lease liability 1,666 1,885
Total liabilities 4,378 3,763
Commitments and contingencies (Note 4)
Partnership capital:    
General Partner 860 536
Unitholders 105,068 84,028
Total partnership capital 105,928 84,564
Total liabilities and partnership capital 110,306 88,327
Leasehold Improvements [Member]    
Property and leasehold improvements - at cost:    
Leasehold improvements 989 989
Accumulated amortization (307) (238)
Total $ 682 $ 751