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Note 13 - Business Segment Information (Details Textual) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($) | Mar. 31, 2022
Waste Management Services [Member] |  |
Increase (Decrease) in Total Assets | $ 2.4 |
Golf and Related Operations [Member] |  |
Increase (Decrease) in Total Assets | 2.8 |
Corporate Segment [Member] |  |
Increase (Decrease) in Total Assets | $ (0.1) |
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 | 22.00% | 13.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage | 22.00% |
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Waste Management Services [Member] |  |
Number of Major Customers | 2 | 2
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] |  |
Concentration Risk, Percentage | 32.00% | 20.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage | 32.00% | 20.00%

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