Note 13 - Business Segment Information (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 1.6
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	3.8
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ (9.2)
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	2	1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	59.00%	59.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member]
Concentration Risk, Percentage	6.00%	7.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	6.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Waste Management Services [Member]
Number of Major Customers	2
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member]
Concentration Risk, Percentage	10.00%	12.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	10.00%