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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Thousands
May 18, 2022
Sep. 15, 2014
Mar. 31, 2022
Mar. 31, 2021
Sep. 30, 2014
Subsequent Event [Line Items]          
Prepaid expenses and other current assets     $ 10,147 $ 3,508  
Spectrum revenue          
Subsequent Event [Line Items]          
Prepaid expenses and other current assets         $ 7,500
Subsequent Event          
Subsequent Event [Line Items]          
Sale of stock (in shares) 500,000        
Shares converted (in shares) 500,000        
Conversion price (in dollars per share) $ 20.00        
Common Class B Units | PDV Spectrum Holding Company, LLC          
Subsequent Event [Line Items]          
Equity method investee, cumulative proceeds received on all transactions   $ 10,000