Note 13 - Business Segment Information (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017
Corporate, Non-Segment [Member]
Increase (Decrease) in Total Assets	$ (2.3)
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Number of Major Customers	0	1
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | One Customer [Member]
Concentration Risk, Percentage		7.00%
Golf and Related Operations [Member]
Number of Golf Courses	3
Increase (Decrease) in Total Assets	$ 2.6
Waste Management Services [Member]
Increase (Decrease) in Total Assets	$ 2.8
Waste Management Services [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | One Customer [Member]
Concentration Risk, Percentage		10.00%