Note 8 - Derivative Instruments - Fair Value of Forward and Put Option Contracts (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent | ||
| Derivative [Line Items] | ||
| Net asset (liability) | $ 0.0 | $ 8.6 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | ||
| Derivative [Line Items] | ||
| Net asset (liability) | 0.0 | 7.2 |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesCurrent | ||
| Derivative [Line Items] | ||
| Net asset (liability) | (13.7) | (36.4) |
| Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent | ||
| Derivative [Line Items] | ||
| Net asset (liability) | $ (8.7) | $ (1.9) |