Note 5 - Revenues - Disaggregation of Revenue (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 11,516	$ 10,702
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	8,458	7,613
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	7,875	7,093
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	583	520
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	3,058	3,089
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,040	1,106
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,286	1,302
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	376	308
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	38	42
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 318	$ 331