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Revenue - Wholesale Capacity Contract Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Apr. 30, 2023	Feb. 28, 2023	Dec. 31, 2022	Nov. 30, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Funding agreement, additional consideration	$ 13,921			$ 0
Total contract liabilities	60,111			137,516
Warrants issued					$ 48,300
Principal	375,388			202,788
2021 Funding Agreement
Disaggregation of Revenue [Line Items]
Principal	81,700			0		$ 94,200
Unamortized debt discount						$ 11,626
2023 Funding Agreement
Disaggregation of Revenue [Line Items]
Principal	87,730	$ 88,000	$ 87,730	0
Unamortized debt discount			$ 4,509
Wholesale capacity services
Disaggregation of Revenue [Line Items]
Reimbursements (and anticipated reimbursement)	15,700			22,540
Contract asset	(46,084)			(52,696)
Total contract liabilities	34,225			113,825
Wholesale capacity services | Space component
Disaggregation of Revenue [Line Items]
Advanced payments for services expected to be performed	6,079			99,671
Wholesale capacity services | Ground component
Disaggregation of Revenue [Line Items]
Advanced payments for services expected to be performed	24,113			25,438
Wholesale capacity services | Phase 1 Service Fee, Service-Related Operating Expenses, And Capital Expenditures
Disaggregation of Revenue [Line Items]
Advanced payments for services expected to be performed	$ 20,496			$ 18,872

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