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Note 13 - Business Segment Information (Details Textual) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022
Waste Management Services [Member] |  |
Increase (Decrease) in Total Assets | $ 1.7 |
Golf and Related Operations [Member] |  |
Increase (Decrease) in Total Assets | $ 1.5 |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |
Number of Major Customers | 2 | 1
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] |  |
Concentration Risk, Percentage | 7.00% | 6.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage | 7.00% |
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Waste Management Services [Member] |  |
Number of Major Customers | 2 | 1
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] |  |
Concentration Risk, Percentage | 15.00% | 10.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage | 15.00% |

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