Note 5 - Revenues - Disaggregation of Revenue (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 16,705	$ 14,577	$ 28,221	$ 25,279
Waste Management Services [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	11,510	9,490	19,968	17,103
Waste Management Services [Member] | Waste Brokerage And Management Services Member
Revenue from Contract with Customer, Excluding Assessed Tax, Total	10,895	8,916	18,770	16,009
Waste Management Services [Member] | Captive Landfill Management Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	615	574	1,198	1,094
Golf and Related Operations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	5,195	5,087	8,253	8,176
Golf and Related Operations [Member] | Food and Beverage [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	2,206	2,270	3,246	3,376
Golf and Related Operations [Member] | Membership Dues [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	1,307	1,294	2,593	2,596
Golf and Related Operations [Member] | Room Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	666	572	1,042	880
Golf and Related Operations [Member] | Green Fees and Cart Rental [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	557	534	595	576
Golf and Related Operations [Member] | Other Revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax, Total	$ 459	$ 417	$ 777	$ 748