v3.26.1
Warrants and Warrant Liability (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
May 27, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Warrants and Warrant Liability (Details) [Line Items]            
Other current assets   $ 72,866   $ 72,866   $ 2,927
Warrants outstanding   21,979,899   21,979,899    
Description of warrants       the right to redeem the outstanding Public Warrants in whole and not in part at a price of $0.01 per warrant upon a minimum of 30 days’ prior written notice of redemption, if and only if the last sales price of the Company’s common stock matched or exceeded $18.00 per share for any 20 trading days within a 30-trading day period ending on the third trading day prior to the date on which NextNav sends the notice of redemption to the warrant holders.    
Proceeds from exercise of common warrants       $ 100,305 $ 582  
Warrant [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Stock Reclassified During Period Shares Reclassification From Warrant Liability To Equity   339,977 0 339,977 205,402  
Adjustments To Additional Paid In Capital Reclassification From Warrant Liability       $ 3,900 $ 1,200  
Note Purchase Agreement and Indenture Agreement [Member] | Senior Secured Notes due 2026 [Member] | Warrant [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Warrants outstanding   10,485,086   10,485,086    
Public Warrants and Private Placement Warrants [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Warrants, maturity date   Oct. 28, 2026   Oct. 28, 2026    
Public Warrants and Private Placement Warrants [Member] | Note Purchase Agreement and Indenture Agreement [Member] | Senior Secured Notes due 2026 [Member] | Warrant [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Class of warrant or right number of securities called by each warrant or right   1   1    
Exercise price per unit (in Dollars per share)   $ 11.5   $ 11.5    
Public Warrants [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Other current assets   $ 69,300   $ 69,300    
Warrants outstanding 15,054,146          
Exercise price per unit (in Dollars per share) $ 11.5          
Exercise of common stock options (in shares) 14,736,141          
Proceeds from exercise of common warrants $ 169,500          
Public Warrants [Member] | Spartacus Acquisition Corp [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Warrants outstanding   14,714,169   14,714,169    
Public Warrants [Member] | Warrant Redemption [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Warrants outstanding   318,005   318,005    
Warrants redemption price   0.01   0.01    
Warrants redemption payment       $ 3    
Private placement warrants            
Warrants and Warrant Liability (Details) [Line Items]            
Warrants outstanding   3,694,813   3,694,813    
Common stock purchase warrants [Member] | Note Purchase Agreement [Member] | Private Placement [Member]            
Warrants and Warrant Liability (Details) [Line Items]            
Warrants outstanding   7,800,000   7,800,000