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Note 16 - Business Segment Information (Details Textual) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2021 USD ($) | Dec. 31, 2020
Waste Management Services [Member] |  |  |
Increase (Decrease) in Total Assets |  | $ 2.3 |
Golf and Related Operations [Member] |  |  |
Increase (Decrease) in Total Assets |  | 1.8 |
Corporate Segment [Member] |  |  |
Increase (Decrease) in Total Assets |  | $ (4.4) |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |  |
Number of Major Customers |  | 1 | 0
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 | 1 |  |
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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