Note 11 - Reinsurance (Details Textual) - USD ($) $ in Millions |
3 Months Ended | ||||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Reinsurance Retention [Line Items] | |||||
| Reinsurance XOL treaty retention amount retained per event | $ 1.5 | ||||
| Reinsurance Policy, Excess of Loss Protection Amount | 865.0 | ||||
| Catastrophe Bond, Face Value | $ 360.0 | $ 525.0 | $ 420.0 | $ 200.0 | |
| Earthquake [Member] | |||||
| Reinsurance Retention [Line Items] | |||||
| Reinsurance, Amount Retained, Per Event | 20.0 | ||||
| Reinsurance Policy, Excess of Loss Protection Amount | 3,900.0 | ||||
| U.S. Hurricane [Member] | |||||
| Reinsurance Retention [Line Items] | |||||
| Reinsurance Policy, Excess of Loss Protection Amount | 135.0 | ||||
| Continental Hurricane [Member] | |||||
| Reinsurance Retention [Line Items] | |||||
| Reinsurance, Amount Retained, Per Event | $ 11.0 |