Note 13 - Business Segment Information (Details Textual) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019	Jan. 07, 2020
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ (0.7)
Golf and Related Operations [Member]
Increase (Decrease) in Total Assets	2.2
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ (0.6)
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	0