Note 6 - Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 16,390	$ 13,067	$ 31,503	$ 27,470
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	8,685	9,088	19,835	20,221
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	8,078	8,501	18,629	19,026
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	607	587	1,206	1,195
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	7,705	3,979	11,668	7,249
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	3,283	1,361	4,624	2,396
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,661	1,496	3,268	3,018
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,126	321	1,614	593
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	917	613	1,003	666
Golf and Related Operations [Member] | Tennis Lessons [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	92	24	224	141
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 626	$ 164	$ 935	$ 435