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Revenue - Accounts Receivable and Contract Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Disaggregation of Revenue [Line Items] |  |
Total accounts receivable, net of allowance for credit losses | $ 43,218 | $ 26,329
Accounts receivable | 43,218 | 42,429
Short-term contract liabilities | 58,091 | 74,639
Long-term contract liabilities | 2,020 | 62,877
Total contract liabilities | 60,111 | 137,516
Subscriber driven |  |
Disaggregation of Revenue [Line Items] |  |
Total accounts receivable, net of allowance for credit losses | 20,203 | 14,850
Short-term contract liabilities | 24,281 | 21,987
Long-term contract liabilities | 1,605 | 1,704
Wholesale capacity services |  |
Disaggregation of Revenue [Line Items] |  |
Total accounts receivable, net of allowance for credit losses | 21,322 | 7,234
Long-term wholesale capacity accounts receivable | 0 | 16,100
Short-term contract liabilities | 33,810 | 52,652
Long-term contract liabilities | 415 | 61,173
Total contract liabilities | 34,225 | 113,825
Agency agreement accounts receivable |  |
Disaggregation of Revenue [Line Items] |  |
Total accounts receivable, net of allowance for credit losses | $ 1,693 | $ 4,245

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