Note 5 - Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 18,018	$ 18,148	$ 51,051	$ 46,369
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	11,572	12,557	35,908	32,525
Waste Management Services [Member] \| Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	10,867	12,009	33,853	30,779
Waste Management Services [Member] \| Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	705	548	2,055	1,746
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	6,446	5,591	15,143	13,844
Golf and Related Operations [Member] \| Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	2,587	2,285	6,027	5,531
Golf and Related Operations [Member] \| Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,474	1,278	4,220	3,871
Golf and Related Operations [Member] \| Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	814	739	1,808	1,781
Golf and Related Operations [Member] \| Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,098	865	1,755	1,460
Golf and Related Operations [Member] \| Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 473	$ 424	$ 1,333	$ 1,201