Note 14 - Business Segment Information (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 0.7
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	1.6
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ (2.6)
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	1	0
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Waste Management Services [Member]
Number of Major Customers	0
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	7.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	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	12.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	12.00%