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Note 13 - Segment Information - Reportable Segment Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Operating revenues (1) [1] $ 20,960 $ 12,443
Operating costs and expenses (6,171) (5,600)
Depreciation expense (1,109) (1,188)
General and administrative expenses (4,073) (4,018)
Operating income (loss) 9,607 1,637
Pension and other post-retirement expenses (7,885) (4,732)
Interest expense (6) (122)
Other income 71 13
Income from continuing operations 1,787 (3,204)
Capital expenditures (2) [2] 33 103
Assets (3) [3] 42,406 37,919
Operating Segments [Member] | Real Estate Segment [Member]    
Operating revenues (1) [1] 11,600 3,400
Operating costs and expenses (1,026) (750)
Depreciation expense 0 0
General and administrative expenses (1,068) (1,049)
Operating income (loss) 9,506 1,601
Capital expenditures (2) [2] 33 74
Assets (3) [3] 15,274 15,525
Operating Segments [Member] | Leasing Segment [Member]    
Operating revenues (1) [1] 8,513 8,103
Operating costs and expenses (3,598) (3,495)
Depreciation expense (1,101) (1,177)
General and administrative expenses (1,141) (1,121)
Operating income (loss) 2,673 2,310
Capital expenditures (2) [2] 0 29
Assets (3) [3] 13,586 14,684
Operating Segments [Member] | Resort Amenities Segment [Member]    
Operating revenues (1) [1] 847 940
Operating costs and expenses (1,547) (1,355)
Depreciation expense 0 0
General and administrative expenses (496) (487)
Operating income (loss) (1,196) (902)
Capital expenditures (2) [2] 0 0
Assets (3) [3] 815 800
Operating Segments [Member] | Corporate and Other [Member]    
Operating revenues (1) [1] 0 0
Operating costs and expenses 0 0
Depreciation expense (8) (11)
General and administrative expenses (1,368) (1,361)
Operating income (loss) (1,376) (1,372)
Capital expenditures (2) [2] 0 0
Assets (3) [3] $ 12,731 $ 6,910
[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.