| Segment Reporting [Table Text Block] |
| | | Land Leasing & Management | | | Agribusiness Ventures | | | Land Development and Sales | | | Commercial Real Estate Leasing | | | Other | | | Consolidated | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Three months ended June 30, 2026 | | | | | | | | | | | | | | | | | | | | | | | | |
| Operating revenues (1) | | $ | 1,502 | | | $ | - | | | $ | 235 | | | $ | 1,961 | | | $ | - | | | $ | 3,698 | |
| Operating costs and expenses | | | (1,324 | ) | | | (39 | ) | | | (287 | ) | | | (907 | ) | | | - | | | | (2,557 | ) |
| Depreciation expense | | | (35 | ) | | | (7 | ) | | | (1 | ) | | | (160 | ) | | | (54 | ) | | | (257 | ) |
| General and administrative expenses | | | (253 | ) | | | (84 | ) | | | (253 | ) | | | (84 | ) | | | (2,006 | ) | | | (2,680 | ) |
| Operating income (loss) | | | (110 | ) | | | (130 | ) | | | (306 | ) | | | 810 | | | | (2,060 | ) | | | (1,796 | ) |
| Pension and other postretirement expenses | | | | | | | | | | | | | | | | | | | | | | | (20 | ) |
| Interest expense | | | | | | | | | | | | | | | | | | | | | | | (101 | ) |
| Other income, net | | | | | | | | | | | | | | | | | | | | | | | 289 | |
| Loss from continuing operations | | | | | | | | | | | | | | | | | | | | | | | (1,628 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Capital expenditures (2) | | $ | 767 | | | $ | 536 | | | $ | 910 | | | $ | - | | | $ | - | | | $ | 2,213 | |
| Assets (3) | | $ | 16,203 | | | $ | 2,631 | | | $ | 15,512 | | | $ | 9,215 | | | $ | 6,064 | | | $ | 49,625 | |
| | | Land Leasing & Management | | | Agribusiness Ventures | | | Land Development and Sales | | | Commercial Real Estate Leasing | | | Other | | | Consolidated | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Six months ended June 30, 2026 | | | | | | | | | | | | | | | | | | | | | | | | |
| Operating revenues (1) | | $ | 2,689 | | | $ | - | | | $ | 492 | | | $ | 3,916 | | | $ | - | | | $ | 7,097 | |
| Operating costs and expenses | | | (3,108 | ) | | | (93 | ) | | | (624 | ) | | | (1,679 | ) | | | - | | | | (5,504 | ) |
| Depreciation expense | | | (68 | ) | | | (14 | ) | | | (3 | ) | | | (315 | ) | | | (90 | ) | | | (490 | ) |
| General and administrative expenses | | | (447 | ) | | | (149 | ) | | | (447 | ) | | | (149 | ) | | | (3,722 | ) | | | (4,914 | ) |
| Operating income (loss) | | | (934 | ) | | | (256 | ) | | | (582 | ) | | | 1,773 | | | | (3,812 | ) | | | (3,811 | ) |
| Pension and other postretirement expenses | | | | | | | | | | | | | | | | | | | | | | | (41 | ) |
| Interest expense | | | | | | | | | | | | | | | | | | | | | | | (163 | ) |
| Other income, net | | | | | | | | | | | | | | | | | | | | | | | 327 | |
| Loss from continuing operations | | | | | | | | | | | | | | | | | | | | | | | (3,688 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Capital expenditures (2) | | $ | 933 | | | $ | 805 | | | $ | 1,661 | | | $ | 40 | | | $ | - | | | $ | 3,439 | |
| Assets (3) | | $ | 16,203 | | | $ | 2,631 | | | $ | 15,512 | | | $ | 9,215 | | | $ | 6,064 | | | $ | 49,625 | |
| | | Land Leasing & Management | | | Agribusiness Ventures | | | Land Development and Sales | | | Commercial Real Estate Leasing | | | Other | | | Consolidated | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Three months ended June 30, 2025 | | | | | | | | | | | | | | | | | | | | | | | | |
| Operating revenues (1) | | $ | 1,294 | | | $ | - | | | $ | 1,438 | | | $ | 1,870 | | | $ | - | | | $ | 4,602 | |
| Operating costs and expenses | | | (1,059 | ) | | | (35 | ) | | | (1,181 | ) | | | (914 | ) | | | - | | | | (3,189 | ) |
| Depreciation expense | | | (141 | ) | | | - | | | | - | | | | (190 | ) | | | (24 | ) | | | (355 | ) |
| General and administrative expenses | | | (154 | ) | | | (51 | ) | | | (154 | ) | | | (51 | ) | | | (1,359 | ) | | | (1,769 | ) |
| Operating income (loss) | | | (60 | ) | | | (86 | ) | | | 103 | | | | 715 | | | | (1,383 | ) | | | (711 | ) |
| Pension and other postretirement expenses | | | | | | | | | | | | | | | | | | | | | | | (582 | ) |
| Interest expense | | | | | | | | | | | | | | | | | | | | | | | (55 | ) |
| Other income | | | | | | | | | | | | | | | | | | | | | | | 349 | |
| Income from continuing operations | | | | | | | | | | | | | | | | | | | | | | | (999 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Capital expenditures (2) | | $ | 582 | | | $ | 390 | | | $ | 447 | | | $ | 112 | | | $ | - | | | $ | 1,531 | |
| Assets (3) | | $ | 14,729 | | | $ | 685 | | | $ | 11,364 | | | $ | 10,470 | | | $ | 8,491 | | | $ | 45,739 | |
| | | Land Leasing & Management | | | Agribusiness Ventures | | | Land Development and Sales | | | Commercial Real Estate Leasing | | | Other | | | Consolidated | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Six months ended June 30, 2025 | | | | | | | | | | | | | | | | | | | | | | | | |
| Operating revenues (1) | | $ | 2,529 | | | $ | - | | | $ | 4,056 | | | $ | 3,821 | | | $ | - | | | $ | 10,406 | |
| Operating costs and expenses | | | (1,741 | ) | | | (35 | ) | | | (4,119 | ) | | | (1,626 | ) | | | - | | | | (7,521 | ) |
| Depreciation expense | | | (162 | ) | | | - | | | | - | | | | (327 | ) | | | (52 | ) | | | (541 | ) |
| General and administrative expenses | | | (377 | ) | | | (126 | ) | | | (377 | ) | | | (126 | ) | | | (3,829 | ) | | | (4,835 | ) |
| Operating income (loss) | | | 249 | | | | (161 | ) | | | (440 | ) | | | 1,742 | | | | (3,881 | ) | | | (2,491 | ) |
| Pension and other postretirement expenses | | | | | | | | | | | | | | | | | | | | | | | (7,501 | ) |
| Interest expense | | | | | | | | | | | | | | | | | | | | | | | (103 | ) |
| Loss on asset disposal, net | | | | | | | | | | | | | | | | | | | | | | | 1 | |
| Other income | | | | | | | | | | | | | | | | | | | | | | | 455 | |
| Income from continuing operations | | | | | | | | | | | | | | | | | | | | | | | (9,639 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| Capital expenditures (2) | | $ | 868 | | | $ | 392 | | | $ | 577 | | | $ | 267 | | | $ | - | | | $ | 2,104 | |
| Assets (3) | | $ | 14,729 | | | $ | 685 | | | $ | 11,364 | | | $ | 10,470 | | | $ | 8,491 | | | $ | 45,739 | |
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