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Note 12 - Business Segment Information (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016
Corporate, Non-Segment [Member] |  |
Increase (Decrease) in Total Assets | $ (2.4) |
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |
Number of Major Customers | 1 | 0
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | One Customer [Member] |  |
Concentration Risk, Percentage | 9.00% |
Golf and Related Operations [Member] |  |
Number of Golf Courses | 3 |
Increase (Decrease) in Total Assets | $ 0.5 |
Waste Management Services [Member] |  |
Increase (Decrease) in Total Assets | $ 1.4 |
Waste Management Services [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | One Customer [Member] |  |
Concentration Risk, Percentage | 12.00% |

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