Note 6 - Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 15,113	$ 14,403
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	11,150	11,133
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	10,551	10,525
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	599	608
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	3,963	3,270
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,341	1,035
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,607	1,522
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	488	272
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	86	53
Golf and Related Operations [Member] | Tennis Lessons [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	132	113
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 309	$ 275