Note 13 - Business Segment Information - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue	$ 25,746	$ 24,235	$ 62,067	$ 66,150
Cost of operations	(19,642)	(18,267)	(49,419)	(52,014)
Selling, general and administrative	(2,826)	(2,719)	(7,835)	(7,970)
Depreciation and amortization	(932)	(975)	(2,867)	(2,957)
Interest expense, net	(512)	(502)	(1,532)	(1,531)
Income (loss) before taxes	1,834	1,772	414	1,685
Other	0	0	0	7
Waste Management Services [Member]
Revenue	12,918	11,461	32,338	36,151
Cost of operations	(10,259)	(8,949)	(25,330)	(28,372)
Golf and Related Operations [Member]
Revenue	12,828	12,774	29,729	29,999
Operating Segments [Member]
Revenue	25,746	24,235	62,067	66,150
Operating Segments [Member] | Waste Management Services [Member]
Revenue	12,918	11,461	32,338	36,151
Cost of operations	(10,259)	(8,949)	(25,330)	(28,372)
Selling, general and administrative	(1,294)	(1,213)	(3,644)	(3,848)
Depreciation and amortization	(49)	(52)	(145)	(147)
Interest expense, net	(6)	(7)	(19)	(19)
Income (loss) before taxes	1,310	1,240	3,200	3,772
Other				7
Operating Segments [Member] | Golf and Related Operations [Member]
Revenue	12,828	12,774	29,729	29,999
Cost of operations	(9,383)	(9,318)	(24,089)	(23,642)
Selling, general and administrative	(652)	(648)	(1,624)	(1,604)
Depreciation and amortization	(840)	(879)	(2,592)	(2,667)
Interest expense, net	(23)	(7)	(51)	(24)
Income (loss) before taxes	1,930	1,922	1,373	2,062
Other				0
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Revenue	0	0	0	0
Cost of operations	0	0	0	0
Selling, general and administrative	(880)	(858)	(2,567)	(2,518)
Depreciation and amortization	(43)	(44)	(130)	(143)
Interest expense, net	(483)	(488)	(1,462)	(1,488)
Income (loss) before taxes	$ (1,406)	$ (1,390)	$ (4,159)	(4,149)
Other				$ 0