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Goodwill and Intangible Assets -Schedule of acquired finite-lived intangible assets by major class (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Definite lived intagible assets,Net book value $ 2,701  
Indefinite lived intangible assets Gross Carrying Amount   $ 0
Indefinite lived intangible assets,Additions 4,133  
Indefinite lived intangible assets,Impairment 0  
Indefinite lived intangible assets Accumulated Amortization (460)  
Indefinite lived intangible assets,Net book value 3,673  
Indefinite lived intangible assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Indefinite lived intangible assets Gross Carrying Amount   0
Indefinite lived intangible assets,Additions 972  
Indefinite lived intangible assets,Impairment 0  
Indefinite lived intangible assets Accumulated Amortization 0  
Indefinite lived intangible assets,Net book value 972  
Definite lived intangible assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intagible assets, Gross Carrying Amount   0
Finite intangible assets acquired 3,161  
Definite lived intagible assets,Impairment 0  
Definite lived intagible assets, Accumulated amortization (460)  
Definite lived intagible assets,Net book value 2,701  
CBRS FCC license | Indefinite lived intangible assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Indefinite lived intangible assets Gross Carrying Amount   0
Indefinite lived intangible assets,Additions 580  
Indefinite lived intangible assets,Impairment 0  
Indefinite lived intangible assets Accumulated Amortization 0  
Indefinite lived intangible assets,Net book value $ 580  
Subscriber relationships | Definite lived intangible assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intagible assets Weighted Average Remaining Amortization Period 4 years 2 months 15 days  
Definite lived intagible assets, Gross Carrying Amount   0
Finite intangible assets acquired $ 2,654  
Definite lived intagible assets,Impairment 0  
Definite lived intagible assets, Accumulated amortization (420)  
Definite lived intagible assets,Net book value $ 2,234  
Trade name | Definite lived intangible assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Definite lived intagible assets Weighted Average Remaining Amortization Period 9 years 1 month 28 days  
Definite lived intagible assets, Gross Carrying Amount   0
Finite intangible assets acquired $ 507  
Definite lived intagible assets,Impairment 0  
Definite lived intagible assets, Accumulated amortization (40)  
Definite lived intagible assets,Net book value 467  
Internally developed software | Indefinite lived intangible assets [Member]    
Finite-Lived Intangible Assets [Line Items]    
Indefinite lived intangible assets Gross Carrying Amount   $ 0
Indefinite lived intangible assets,Additions 392  
Indefinite lived intangible assets,Impairment 0  
Indefinite lived intangible assets Accumulated Amortization 0  
Indefinite lived intangible assets,Net book value $ 392