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Note 4 - Reportable Segments (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Year Ended December 31, 2023 |
(in thousands) |  | Land and Water Resources |  |  | Water Filtration Technology |  |  | Total |
Total revenues |  |  | 1,251 |  |  |  | 740 |  |  |  | 1,991 |
Costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales |  |  | 2,241 |  |  |  | 646 |  |  |  | 2,887 |
General and administrative |  |  | 18,042 |  |  |  | 755 |  |  |  | 18,797 |
Depreciation |  |  | 1,096 |  |  |  | 151 |  |  |  | 1,247 |
Total costs and expenses |  |  | 21,379 |  |  |  | 1,552 |  |  |  | 22,931 |
Operating loss |  | $ | (20,128 | ) |  | $ | (812 | ) |  | $ | (20,940 | )
Reconciliation of Assets from Segment to Consolidated [Table Text Block] |
|  | December 31, 2023 |  |  | December 31, 2022 |
Operating Segment: |  |  |  |  |  |  |  |
Water and Land Resources |  | $ | 101,946 |  |  | $ | 107,439 |
Water Filtration Technology |  |  | 5,428 |  |  |  | 3,348 |
|  | $ | 107,374 |  |  | $ | 110,787 |
Schedule of Goodwill [Table Text Block] |
|  | December 31, 2023 |  |  | December 31, 2022 |
Operating Segment: |  |  |  |  |  |  |  |
Water and Land Resources |  | $ | 3,813 |  |  | $ | 3,813 |
Water Filtration Technology |  |  | 1,901 |  |  |  | 1,901 |
|  | $ | 5,714 |  |  | $ | 5,714 |
Property, Plant and Equipment [Table Text Block] |
|  | December 31, 2023 |
|  | Water and Land Resources |  |  | Water Filtration Technology |
Land and land improvements |  | $ | 32,357 |  |  | $ | - |
Water programs |  |  | 29,209 |  |  |  | - |
Pipeline |  |  | 22,096 |  |  |  | - |
Buildings |  |  | 1,730 |  |  |  | - |
Leasehold improvements, furniture and fixtures |  |  | 1,605 |  |  |  | 4 |
Machinery and equipment |  |  | 3,719 |  |  |  | 210 |
Construction in progress |  |  | 5,664 |  |  |  | - |
|  |  | 96,380 |  |  |  | 214 |
Less accumulated depreciation |  |  | (9,238 | ) |  |  | (139 | )
|  | $ | 87,142 |  |  | $ | 75 |
|  | December 31, 2022 |
|  | Water and Land Resources |  |  | Water Filtration Technology |
Land and land improvements |  | $ | 30,579 |  |  | $ | - |
Water programs |  |  | 29,210 |  |  |  | - |
Pipeline |  |  | 22,091 |  |  |  | - |
Buildings |  |  | 1,715 |  |  |  | - |
Leasehold improvements, furniture and fixtures |  |  | 1,606 |  |  |  | 3 |
Machinery and equipment |  |  | 3,229 |  |  |  | 166 |
Construction in progress |  |  | 3,680 |  |  |  | - |
|  |  | 92,110 |  |  |  | 169 |
Less accumulated depreciation |  |  | (8,141 | ) |  |  | - |
|  | $ | 83,969 |  |  | $ | 169 |

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