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Revenue - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Mar. 31, 2025 | Sep. 30, 2014
--- | --- | --- | ---
Disaggregation of Revenue [Line Items] |  |  |
Prepaid expenses and other current assets | $ 4,684 | $ 2,801 |
Maximum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contractual term | 10 years |  |
Total spectrum revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Prepaid expenses and other current assets |  |  | $ 7,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Remaining performance obligation, amount | $ 198,900 |  |
Remaining performance obligation, expected timing of satisfaction, period | 30 years |  |

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