Note 14 - Business Segment Information (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 0.4
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	3.6
Corporate Segment [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	13.00%	15.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	13.00%
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	20.00%	20.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	20.00%