Note 6 - Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 21,301	$ 16,625	$ 52,804	$ 44,095
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	11,444	9,326	31,279	29,547
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	10,841	8,792	29,470	27,818
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	603	534	1,809	1,729
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	9,857	7,299	21,525	14,548
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	3,984	2,851	8,608	5,247
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,684	1,522	4,952	4,540
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,824	1,132	3,438	1,725
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,467	1,332	2,470	1,998
Golf and Related Operations [Member] | Tennis Lessons [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	79	72	303	213
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 819	$ 390	$ 1,754	$ 825