Note 13 - Business Segment Information (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 2.4
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	2.8
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ (0.1)
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	22.00%	13.00%
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	2	2
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member]
Concentration Risk, Percentage	32.00%	20.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	32.00%	20.00%