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Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current assets    
Cash and cash equivalents $ 18,411 $ 39,091
Accounts receivable, net 38,569 42,701
Other current assets, net 2,570 1,822
Total current assets 59,550 83,614
Land 24,008 24,008
Mineral rights, net 400,548 412,312
Intangible assets, net 14,014 14,713
Equity in unconsolidated investment 282,491 306,470
Long-term contract receivable, net 26,997 28,946
Other long-term assets, net 7,601 7,068
Total assets 815,209 877,131
Current liabilities    
Accounts payable 1,143 1,992
Accrued liabilities 6,511 11,916
Accrued interest 1,224 989
Current portion of deferred revenue 6,399 6,256
Current portion of long-term debt, net 36,780 39,076
Total current liabilities 52,057 60,229
Deferred revenue 35,076 40,181
Long-term debt, net 170,735 129,205
Other non-current liabilities 6,833 5,472
Total liabilities 264,701 235,087
Commitments and contingencies (see Note 13)
Class A Convertible Preferred Units (71,666 and 250,000 units issued and outstanding at September 30, 2023 and December 31, 2022, respectively, at $1,000 par value per unit; liquidation preference of $1,850 per unit at September 30, 2023 and December 31, 2022) (See Note 3) 47,181 164,587
Partners’ capital    
Common unitholders’ interest (12,634,642 and 12,505,996 units issued and outstanding at September 30, 2023 and December 31, 2022, respectively) 461,043 404,799
General partner’s interest 7,196 5,977
Warrant holders’ interest 32,843 47,964
Accumulated other comprehensive income 2,245 18,717
Total partners’ capital 503,327 477,457
Total liabilities and partners' capital $ 815,209 $ 877,131