v3.26.1
Summary of Significant Accounting Policies - Contract Revenues (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Summary of Significant Accounting Policies [Line Items]          
Receivables, net $ 8,921   $ 8,921   $ 7,380
Contract liabilities, net 0   0   4,190
Purchased services and other 3,792 $ 3,570 10,959 $ 10,205  
Charter revenues 905 53,573 64,174 144,369  
Contract asset 0   0    
Minimum Crew Availability          
Summary of Significant Accounting Policies [Line Items]          
Revenue from crew availability minimums         2,458
Fixed Daily Revenue          
Summary of Significant Accounting Policies [Line Items]          
Revenue from crew availability minimums         109
On-Demand Charter Service          
Summary of Significant Accounting Policies [Line Items]          
Receivables, net 149   149   635
Charter revenues 528   9,333    
Contract Revenue          
Summary of Significant Accounting Policies [Line Items]          
Charter revenues 528 53,570 63,790 144,362  
Short-Term Contract with Customer          
Summary of Significant Accounting Policies [Line Items]          
Contract liabilities, net         753
Air Wisconsin          
Summary of Significant Accounting Policies [Line Items]          
Deferred revenue current         753
Air Wisconsin | Related Party          
Summary of Significant Accounting Policies [Line Items]          
Receivables, net 0   0   3,395
Non-refundable upfront fee revenues 0 1,558 753 1,900  
Deferred revenue current 0   0    
Contract liabilities, net         3,301
Revenue related to one-time assistance payment, estimated monthly support fee and heavy maintenance revenues 0 2,176 2,998 5,982  
Revenue from contract with customer, excluding assessed tax 0   4,301    
Air Wisconsin | Related Party | Minimum Crew Availability          
Summary of Significant Accounting Policies [Line Items]          
Deferred revenue recognition 0   2,820    
Upfront fee received from minimum crew availability 0 1,420 362 1,904  
Estimated remaining fees to be received from minimum crew availability   14,623   14,623  
Air Wisconsin | Related Party | Fixed Daily Revenue          
Summary of Significant Accounting Policies [Line Items]          
Deferred revenue recognition   3,819   3,901  
Upfront fee received from minimum crew availability $ 0 0 $ 4,486 0  
American Airlines | Air Wisconsin          
Summary of Significant Accounting Policies [Line Items]          
Rebates payable   207   862  
Revenue Benchmark | Product Concentration Risk | Contract Revenue          
Summary of Significant Accounting Policies [Line Items]          
Concentration risk 58.30%   14.50%    
American Capacity Purchase Agreement          
Summary of Significant Accounting Policies [Line Items]          
Revenue from contract with customer, excluding assessed tax $ 0 1,702 $ 4,190 2,044  
American Capacity Purchase Agreement | Fixed Daily Revenue          
Summary of Significant Accounting Policies [Line Items]          
Contract liabilities, net         $ 2,689
American Capacity Purchase Agreement | Air Wisconsin          
Summary of Significant Accounting Policies [Line Items]          
Purchased services and other 0 23,656 17,946 67,154  
American Capacity Purchase Agreement | Air Wisconsin | Related Party          
Summary of Significant Accounting Policies [Line Items]          
Deferred revenue recognition 0 $ 21,792 16,029 $ 63,908  
Revenue received 0   9,496    
Purchased services and other     3,998    
American Capacity Purchase Agreement | American Airlines | Air Wisconsin          
Summary of Significant Accounting Policies [Line Items]          
Rebates payable $ 0   $ 4,500    
American Capacity Purchase Agreement | Revenue Benchmark | Customer Concentration Risk          
Summary of Significant Accounting Policies [Line Items]          
Concentration risk 0.00% 100.00% 84.90% 100.00%