Note 15 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2026		Mar. 31, 2025		Dec. 31, 2025
Revenues	[1]	$ 3,405		$ 5,804
Operating costs and expenses		(2,950)		(4,299)
Depreciation expense		(233)		(186)
General and administrative expenses		(2,237)		(3,098)
Operating income (loss)		(2,015)		(1,779)
Pension and other post-retirement expenses		(20)		(6,919)
Interest expense		(62)		(48)
Other income, net		38		105
Net loss from continuing operations		(2,059)		(8,640)
Capital expenditures (2)	[2]	1,225		579
Assets		47,872	[3]	47,232	[3]	$ 47,968
Gain on asset disposal, net		0		1
Operating Segments [Member] | Land Leasing and Management [Member]
Revenues	[1]	1,192		1,234
Operating costs and expenses		(1,784)		(652)
Depreciation expense		(30)		(18)
General and administrative expenses		(195)		(228)
Operating income (loss)		(817)		336
Capital expenditures (2)	[2]	258		104
Assets	[3]	16,027		14,940	[4]
Operating Segments [Member] | Agribusiness Venture [Member]
Revenues		0		0	[1]
Operating costs and expenses		(55)		0
Depreciation expense		(7)		0
General and administrative expenses		(65)		(76)
Operating income (loss)		(127)		(76)
Capital expenditures (2)		280		0	[2]
Assets		2,095		196	[3]
Operating Segments [Member] | Land Development and Sales [Member]
Revenues	[1]	257		2,619
Operating costs and expenses		(338)		(2,933)
Depreciation expense		0		0
General and administrative expenses		(195)		(228)
Operating income (loss)		(276)		(542)
Capital expenditures (2)	[2]	647		431
Assets	[3]	15,279		11,677
Operating Segments [Member] | Commercial Real Estate Leasing [Member]
Revenues	[1]	1,956		1,951
Operating costs and expenses		(773)		(714)
Depreciation expense		(156)		(136)
General and administrative expenses		(65)		(75)
Operating income (loss)		962		1,025
Capital expenditures (2)	[2]	40		44
Assets	[3]	9,098		10,409
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Revenues	[1]	0		0
Operating costs and expenses		0		0
Depreciation expense		(40)		(32)
General and administrative expenses		(1,717)		(2,491)
Operating income (loss)		(1,757)		(2,525)
Pension and other post-retirement expenses
Interest expense
Other income, net
Net loss from continuing operations
Capital expenditures (2)	[2]	0		0
Assets	[3]	$ 5,373		10,010
Gain on asset disposal, net

[1] Amounts are principally revenues from external customers and exclude equity in earning of affiliates. The Company does not have a single external customer that amounts to 10% or more of the Company’s revenues.

[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 $42,000 equity method investment as of March 31, 2025.