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Note 13 - Segment Information - Reportable Segment Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Revenues $ 11,565 $ 9,289
Depreciation expense (723) (869)
Operating loss (7,354) (4,971)
Gain (loss) on assets disposal 48 0
Other income 924 707
Assets 50,139 42,223
Operating Segments [Member]    
Revenues [1] 11,565 9,289
Operating costs and expenses (7,587) (6,547)
Depreciation expense (723) (869)
General and administrative expenses (10,609) (6,844)
Operating loss (7,354) (4,971)
Pension and other post-retirement expenses (948) (436)
Interest expense (61) (6)
Gain (loss) on assets disposal 48  
Other income 924 707
Income from continuing operations (7,391) (3,080)
Capital expenditures [2] 3,532 819
Assets [3] 50,139 [4] 42,223
Gain from derecognition of nonfinancial asset   1,626
Operating Segments [Member] | Land Development and Sales Segment [Member]    
Revenues [1] 520 0
Operating costs and expenses (1,104) (595)
Depreciation expense 0 0
General and administrative expenses (645) (908)
Operating loss (1,229) (1,503)
Capital expenditures [2] 1,661 200
Assets [3],[4] 21,695 17,102
Operating Segments [Member] | Leasing Segment [Member]    
Revenues [1] 9,621 8,461
Operating costs and expenses (5,006) (4,420)
Depreciation expense (668) (861)
General and administrative expenses (859) (456)
Operating loss 3,088 2,724
Capital expenditures [2] 1,871 619
Assets [3] 16,672 [4] 14,489
Operating Segments [Member] | Resort Amenities Segment [Member]    
Revenues [1] 1,424 828
Operating costs and expenses (1,477) (1,532)
Depreciation expense 0 0
General and administrative expenses (215) (393)
Operating loss (268) (1,097)
Capital expenditures [2] 0 0
Assets [3] 1,323 [4] 1,018
Operating Segments [Member] | Corporate Segment and Other Operating Segment [Member]    
Revenues [1] 0 0
Operating costs and expenses 0 0
Depreciation expense (55) (8)
General and administrative expenses (8,890) (5,087)
Operating loss (8,945) (5,095)
Capital expenditures [2] 0 0
Assets [3] $ 10,449 [4] $ 9,614
[1] Amounts are principally revenues from external customers and exclude equity in earnings of affiliates.
[2] Includes expenditures for property and deferred costs.
[3] Segment assets are located in the United States
[4] The Land Development and Sales segment includes a $0.9 million equity method investment as of December 31, 2024.