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Note 15 - Business Segment Information (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021
Waste Management Services [Member] |  |
Increase (Decrease) in Total Assets | $ 1.0 |
Golf and Related Operations [Member] |  |
Increase (Decrease) in Total Assets | 3.6 |
Corporate Segment [Member] |  |
Increase (Decrease) in Total Assets | $ 10.6 |
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 | 14.00% |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Two Customers [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage | 14.00% |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] |  |
Concentration Risk, Percentage |  | 8.00%
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage |  | 8.00%
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 | 22.00% |
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | Two Customers [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage | 22.00% |
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member] |  |
Concentration Risk, Percentage |  | 13.00%
Customer Concentration Risk [Member] | Sales Revenue, Net to External Customers [Member] | One Customer [Member] | Waste Management Services [Member] |  |
Concentration Risk, Percentage |  | 13.00%

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