Note 14 - Business Segment Information (Details Textual) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020	Dec. 31, 2020 USD ($)
Assets, Total	$ 78,720		$ 77,950
Waste Management Services [Member]
Assets, Total	$ 31,900		$ 31,900
Golf and Related Operations [Member]
Number of Major Customers	1,900,000		800,000
Increase (Decrease) in Total Assets	$ 1,900
Corporate Segment [Member]
Increase (Decrease) in Total Assets	$ (1,000)
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	11.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member] | Waste Management Services [Member]
Concentration Risk, Percentage	11.00%