Note 5 - Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 18,425	$ 16,705	$ 33,033	$ 28,221
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	12,902	11,510	24,336	19,968
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	12,188	10,895	22,986	18,770
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	714	615	1,350	1,198
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	5,523	5,195	8,697	8,253
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	2,358	2,206	3,440	3,246
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,424	1,307	2,746	2,593
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	658	666	994	1,042
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	616	557	657	595
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 467	$ 459	$ 860	$ 777