Note 13 - Business Segment Information (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ (1.8)
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	2.3
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ 1.1
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Number of Major Customers	0	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