Note 13 - Business Segment Information (Details Textual) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 0.6
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	5.1
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ 1.1
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	1	1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Waste Management Services [Member]
Number of Major Customers	1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member]
Concentration Risk, Percentage	6.00%	7.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	6.00%	7.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Waste Management Services [Member]
Number of Major Customers		1
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member]
Concentration Risk, Percentage	10.00%	11.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	10.00%	11.00%