Note 9 - Segment Information - Reportable Segment Information (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017
Operating revenues		$ 11,037		$ 24,582
Operating costs and expenses		(14,868)		(12,621)
Depreciation expense		(1,770)		(1,756)
General and administrative and other expenses		(2,896)		(2,515)
Operating income (loss)		(3,831)		11,961
Pension and other post-retirement expenses		(514)		(871)
Income tax benefit		4,999
Assets		48,100		44,801
Operating Segments [Member]
Operating revenues	[1]	11,037		24,582	[2]
Operating costs and expenses		(8,662)		(7,031)	[2]
Depreciation expense		(1,770)		(1,756)	[2]
General and administrative and other expenses		(4,436)		(3,834)	[2]
Operating income (loss)		(3,831)		11,961	[2]
Pension and other post-retirement expenses		(514)		(871)	[2]
Interest expense		(156)		(190)	[2]
Income tax benefit		4,999
Income from continuing operations		498		10,900	[2]
Capital expenditures	[3]	421		1,457	[2]
Assets	[4]	48,100		44,801	[2]
Operating Segments [Member] | Real Estate Segment [Member]
Operating revenues	[1]	446		14,575
Operating costs and expenses		(2,770)		(1,457)
Depreciation expense
General and administrative and other expenses		(1,145)		(982)
Operating income (loss)		(3,469)		12,136
Capital expenditures	[3]	273		1,457
Assets	[4]	13,634		13,261
Operating Segments [Member] | Leasing Segment [Member]
Operating revenues	[1]	6,223		5,732
Operating costs and expenses		(2,570)		(2,476)
Depreciation expense		(1,179)		(1,207)
General and administrative and other expenses		(865)		(742)
Operating income (loss)		1,609		1,307
Capital expenditures	[3]
Assets	[4]	17,084		18,100
Operating Segments [Member] | Utilities Segment [Member]
Operating revenues	[1]	3,220		3,153
Operating costs and expenses		(2,213)		(2,065)
Depreciation expense		(525)		(477)
General and administrative and other expenses		(357)		(306)
Operating income (loss)		125		305
Capital expenditures	[3]	148
Assets	[4]	9,388		9,613
Operating Segments [Member] | Resort Amenities Segment [Member]
Operating revenues	[1]	1,148		1,121
Operating costs and expenses		(1,109)		(978)
Depreciation expense		(57)		(52)
General and administrative and other expenses		(531)		(531)
Operating income (loss)		(549)		(440)
Capital expenditures	[3]
Assets	[4]	1,099		1,216
Operating Segments [Member] | Corporate and Other [Member]
Operating revenues	[1],[2]			1
Operating costs and expenses	[2]			(55)
Depreciation expense	[2]	(9)		(20)
General and administrative and other expenses	[2]	(1,538)		(1,273)
Operating income (loss)	[2]	(1,547)		(1,347)
Pension and other post-retirement expenses	[2]
Capital expenditures	[3]		[2]
Assets	[2],[4]	$ 6,895		$ 2,611

[1] Amounts are principally revenues from external customers and exclude equity in earnings of affiliates. Intersegment revenues were insignificant.

[2] Consists primarily of miscellaneous transactions and unallocated general and administrative, and pension and other post-retirement expenses.

[3] Primarily includes expenditures for property and deferred costs.

[4] Segment assets are located in the United States.