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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 13,322 $ 11,232
Trade and other receivables 7,183 5,075
Net profits interest receivable - related party 3,065 1,914
Total current assets 23,570 18,221
Property and leasehold improvements - at cost:    
Oil and natural gas properties (full cost method) 399,282 399,324
Accumulated full cost depletion (333,636) (331,361)
Total 65,646 67,963
Operating lease right-of-use asset 1,334 1,392
Total assets 91,278 88,327
Current liabilities:    
Accounts payable and other current liabilities 1,485 1,578
Operating lease liability 298 300
Total current liabilities 1,783 1,878
Operating lease liability 1,811 1,885
Total liabilities 3,594 3,763
Commitments and contingencies (Note 3)
Partnership capital:    
General Partner 654 536
Unitholders 87,030 84,028
Total partnership capital 87,684 84,564
Total liabilities and partnership capital 91,278 88,327
Leasehold Improvements [Member]    
Property and leasehold improvements - at cost:    
Leasehold improvements 989 989
Accumulated amortization (261) (238)
Total $ 728 $ 751