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Revenue - Wholesale Capacity Contract Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Nov. 30, 2023 | Apr. 30, 2023 | Feb. 28, 2023 | Dec. 31, 2022 | Nov. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | --- | ---
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Additional consideration associated with the 2021 and 2023 Funding Agreements | $ 16,104 |  |  |  | $ 0 |  |
Contract asset | (46,700) |  |  |  | (52,700) |  |
Total contract liabilities | 56,890 |  |  |  | 137,516 |  |
Warrants issued |  |  |  |  |  | $ 48,300 |
Principal amount | 398,661 |  |  |  | 202,788 |  |
2021 Funding Agreement |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Principal amount | 75,450 |  |  |  | 0 |  | $ 94,200
Unamortized debt discount |  |  |  |  |  |  | $ 11,600
2023 Funding Agreement |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Principal amount | 117,253 | $ 29,523 | $ 87,730 | $ 88,000 | 0 |  |
Unamortized debt discount |  |  |  | $ 4,500 |  |  |
Wholesale capacity services |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Advanced payments contractually owed for services expected to be performed with the next-generation satellite constellation prior to the Phase 2 Service Period | 14,204 |  |  |  | 22,540 |  |
Contract asset | (46,665) |  |  |  | (52,696) |  |
Total contract liabilities | 32,442 |  |  |  | 113,825 |  |
Wholesale capacity services | Space component |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Advanced payments for services expected to be performed | 5,219 |  |  |  | 99,671 |  |
Wholesale capacity services | Ground component |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Advanced payments for services expected to be performed | 23,673 |  |  |  | 25,438 |  |
Wholesale capacity services | Phase 1 service fee and service-related operating expenses and capital expenditures |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |
Advanced payments for services expected to be performed | $ 19,907 |  |  |  | $ 18,872 |  |

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