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Note 11 - Reinsurance (Details Textual)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
USD ($)
Reinsurer
Dec. 31, 2024
USD ($)
Reinsurer
Dec. 31, 2023
USD ($)
Reinsurer
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Reinsurance Retention [Line Items]              
Reinsurance, Amount Retained, Per Event $ 44,900 $ 27,900          
Reinsurance XOL treaty retention amount retained per event 1,500            
Reinsurance Policy, Excess of Loss Protection Amount 735,000            
Prepaid Reinsurance Premiums 355,918 276,237          
Catastrophe Bond, Face Value       $ 525,000 $ 420,000 $ 200,000 $ 275,000
Ceded Premiums Written 1,064,230 897,111 $ 731,531        
Ceded Premiums Earned 984,549 886,682 669,808        
Reinsurance recoverables 73,542 118,365 83,181        
Largest Reinsurer One [Member]              
Reinsurance Retention [Line Items]              
Ceded Premiums Earned 66,400 125,900 152,400        
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments 96,500 137,000          
Largest Reinsurer Two [Member]              
Reinsurance Retention [Line Items]              
Ceded Premiums Earned 64,900 67,900 65,900        
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments 51,200 26,900          
Largest Reinsurer Three [Member]              
Reinsurance Retention [Line Items]              
Ceded Premiums Earned 63,100 61,700 $ 47,400        
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments $ 32,800 $ 24,400          
Reinsurance Recoverable Including Reinsurance Premium Paid [Member] | Reinsurer Concentration Risk [Member] | Three Largest Reinsurers [Member]              
Reinsurance Retention [Line Items]              
Number of Largest Reinsurers | Reinsurer 3 3          
Concentration Risk, Percentage 21.90% 47.70%          
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments [Member] | Reinsurer Concentration Risk [Member]              
Reinsurance Retention [Line Items]              
Number of Largest Reinsurers | Reinsurer 3 3 3        
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments [Member] | Reinsurer Concentration Risk [Member] | Three Largest Reinsurers [Member]              
Reinsurance Retention [Line Items]              
Concentration Risk, Percentage 18.60% 28.50% 36.30%        
Earthquake [Member]              
Reinsurance Retention [Line Items]              
Reinsurance, Amount Retained, Per Event $ 20,000            
Reinsurance Policy, Excess of Loss Protection Amount 3,100,000            
U.S. Hurricane [Member]              
Reinsurance Retention [Line Items]              
Reinsurance Policy, Excess of Loss Protection Amount 100,000            
Continental Hurricane [Member]              
Reinsurance Retention [Line Items]              
Reinsurance, Amount Retained, Per Event 11,000            
Catastrophe [Member]              
Reinsurance Retention [Line Items]              
Ceded Premiums Written $ 64,900 $ 55,300 $ 42,700