Note 17 - Commitments and Contingencies (Details Textual) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2021
USD ($)
| |
| Sites Identified | 376 |
| Sites Subject of Actions Taken by US Government | 28 |
| Sites on Superfund National Priorities List | 18 |
| Personal Injury [Member] | |
| Recorded Liability Related to Asserted Claims | 94.00% |
| Recorded Liability Related to Unasserted Claims | 6.00% |
| Personal Injury [Member] | Minimum [Member] | |
| Loss Contingency, Estimate of Possible Loss | $ 325 |
| Personal Injury [Member] | Maximum [Member] | |
| Loss Contingency, Estimate of Possible Loss | $ 358 |