Note 5 - Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 14,403	$ 14,608
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	11,133	11,434
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	10,525	10,798
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	608	636
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	3,270	3,174
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,035	1,082
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,522	1,322
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	272	336
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	53	41
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 388	$ 393