Note 13 - Business Segment Information (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Increase (Decrease) in Total Assets	$ (1.1)
Waste Management Services [Member] | Operating Segments [Member]
Increase (Decrease) in Total Assets	2.1
Golf and Related Operations [Member] | Operating Segments [Member]
Increase (Decrease) in Total Assets	$ 2.1
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	1	2
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Golf and Related Operations [Member]
Number of Major Customers	0	0
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]
Concentration Risk, Percentage	10.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	9.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member]
Concentration Risk, Percentage		22.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage		22.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Waste Management Services [Member]
Number of Major Customers	1	2
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member]
Concentration Risk, Percentage	14.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	14.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member]
Concentration Risk, Percentage		32.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage		32.00%