Note 13 - Business Segment Information (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 1.7
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	$ 1.5
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	2	1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member]
Concentration Risk, Percentage	7.00%	6.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	7.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Waste Management Services [Member]
Number of Major Customers	2	1
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member]
Concentration Risk, Percentage	15.00%	10.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	15.00%