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Revenue - Net Revenues by Majority Companies (Details) $ in Thousands | 5 Months Ended | 6 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 21, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues | $ 5,171 | $ 63,846 | $ 16,651 | $ 16,651 | $ 40,785 | $ 19,013
Customer concentration | Revenue from contract with customer |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues | 3,124 | 34,651 |  | $ 15,020 |  |
Concentration risk (as a percent) |  |  |  | 10 |  |
Customer concentration | Revenue from contract with customer | Air Force Research Laboratory |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues |  | 6,545 |  |  |  |
Customer concentration | Revenue from contract with customer | Boeing |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues |  | 9,049 |  |  |  |
Customer concentration | Revenue from contract with customer | Lockheed Martin |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues | 1,291 |  |  |  |  |
Customer concentration | Revenue from contract with customer | Loral |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues | 551 |  |  |  |  |
Customer concentration | Revenue from contract with customer | NASA |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Revenues | $ 1,282 | $ 19,057 |  | $ 15,020 |  |

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