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Organization and Operations - Additional Information (Detail1)
 3 Months Ended 6 Months Ended 9 Months Ended
Jan. 31, 2025
AirCraft
Jan. 06, 2025
AirCraft
Oct. 31, 2024
AirCraft
Sep. 25, 2024
USD ($)
AirCraft
Jul. 31, 2024
AirCraft
Jul. 01, 2024
USD ($)
Engine
Airframes
Jun. 30, 2024
AirCraft
May 31, 2024
AirCraft
May 30, 2024
USD ($)
May 21, 2024
AirCraft
Apr. 22, 2024
USD ($)
Engine
Airframes
Jun. 30, 2024
USD ($)
Engine
Officer
Airframes
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Airframes
Engine
Jun. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Mar. 31, 2024
Airframes
Jun. 30, 2024
USD ($)
Engine
Airframes
AirCraft
Jun. 30, 2023
USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Net Income (Loss)                       $ (19,908,000) $ 11,660,000 $ (57,850,000) $ (47,560,000) $ (35,122,000) $ (9,090,000)   $ (66,097,000) $ (91,771,000)
Non-cash impairment charge                       $ 4,300,000                
Number of spare engines classified as held for sale | Engine                                     61  
Purcahse of aircraft                                     $ 16,908,000 $ 31,619,000
Number of first officers furloughed | Officer                       53                
Expected savings                       $ 3,900,000                
United Revolving Credit Facility [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Revolving loan       $ 12,400                                
Decrease in Scheduled Flying Activity [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Net Income (Loss)                                     (66,100,000)  
Non-cash impairment charge                                     $ 50,900,000  
Decrease in Scheduled Flying Activity [Member] | RASPRO Aircraft Lease Agreement [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of engines | Engine                     30 15                
Number of airframes without engines | Airframes                     15 6                
Buyout price                       $ 50,300,000                
Net cash from aircraft and equipment purchase agreement                           $ 12,100,000            
Purcahse of aircraft                       22,300,000                
Proceeds from sale of aircraft                       $ 17,300,000                
Decrease in Scheduled Flying Activity [Member] | RASPRO Aircraft Lease Agreement [Member] | Subsequent Event [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of engines | Engine           15                            
Number of airframes without engines | Airframes           9                            
Number of leased airframes without engines | Airframes           3                            
Number of engine sold | Engine           14                            
Purcahse of aircraft           $ 23,200,000                            
Proceeds from sale of aircraft           $ 20,400,000                            
Decrease in Scheduled Flying Activity [Member] | RASPRO Aircraft Lease Agreement One [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of engines | Engine                           30            
Buyout pricing                           $ 19,500,000            
Decrease in Scheduled Flying Activity [Member] | RASPRO Aircraft Lease Agreement Two [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of airframes without engines | Airframes                           15            
Buyout pricing                           $ 18,800,000            
Decrease in Scheduled Flying Activity [Member] | RASPRO Binding Memorandum [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Buyout price                     $ 50,300,000                  
CRJ-900 Aircraft [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of aircraft classified as assets held for sale | AirCraft                                     11  
Number of airframes without engines | Airframes                                   26 20  
Number of aircraft to be removed | AirCraft             2 1   1                    
Number of airframes sold | Airframes                       6                
Number of engine sold | Engine                       15                
CRJ-900 Aircraft [Member] | Subsequent Event [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of aircraft to be removed | AirCraft         2                              
CRJ-900 Aircraft [Member] | Forecast [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of aircraft to be removed | AirCraft 5 5 2                                  
CRJ-900 Aircraft [Member] | Purchase agreement [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Number of aircraft to be removed | AirCraft                                     18  
CRJ-700 Aircraft [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Initial payments                 $ 1,800,000                      
CRJ-700 Aircraft [Member] | Subsequent Event [Member]                                        
Organization Consolidation And Presentation Of Financial Statements [Line Items]                                        
Purcahse of aircraft       $ 11,000,000                                
Number of aircrafts leased | AirCraft       2                                
Number of aircrafts purchased | AirCraft       2