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CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues:    
Lease revenue $ 6,713 $ 7,072
Mining royalty and rents 3,717 3,234
Joint venture management fee revenue 164 0
Total revenues 10,594 10,306
Cost of operations:    
Depreciation/depletion/amortization 2,842 2,607
Operating expenses 2,130 1,859
Property taxes 1,025 938
General and administrative 4,085 2,577
Total cost of operations 10,082 7,981
Total operating profit 512 2,325
Net investment income 1,688 2,561
Interest expense (708) (695)
Equity in loss of joint ventures (2,615) (2,031)
Income (loss) before income taxes (1,123) 2,160
Provision for income taxes (202) 526
Net income (loss) (921) 1,634
Income (loss) attributable to noncontrolling interest (234) (76)
Net income (loss) attributable to the Company $ (687) $ 1,710
Earnings per common share:    
Net income attributable to the Company- Basic (in dollars per share) $ (0.04) $ 0.09
Net income attributable to the Company- Diluted (in dollars per share) $ (0.04) $ 0.09
Number of shares (in thousands) used in computing:    
Basic earnings per common share (in shares) 19,016 18,947
Diluted earnings per common share (in shares) 19,034 19,012