Note 5 - Revenues - Disaggregation of Revenue (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 18,148	$ 16,364	$ 46,369	$ 41,643
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	12,557	10,831	32,525	27,934
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	12,009	10,261	30,779	26,271
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	548	570	1,746	1,663
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	5,591	5,533	13,844	13,709
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	2,285	2,326	5,531	5,702
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,278	1,285	3,871	3,881
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	739	698	1,781	1,578
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	865	849	1,460	1,425
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 424	$ 375	$ 1,201	$ 1,123