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Summary of Significant Accounting Policies - Reconciliation of the Net Earnings (Loss) per Common Share (Detail) - USD ($) |  | 3 Months Ended | 5 Months Ended | 6 Months Ended | 11 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 21, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |
Net Earnings |  |  |  |  | $ (6,238,000) | $ (22,795,000) | $ (1,619,000) | $ (16,946,000) | $ (3,216,000)
Net Loss |  |  |  |  | $ (4,972,000) | $ (23,575,000) | $ (1,334,000) | $ (14,374,000) | $ (3,357,000)
Basic and diluted |  |  |  |  | 100 | 100 |  | 100 |
Earnings/Income/Loss/Basic and Diluted |  |  |  |  | $ (50) | $ (236) |  | $ (144) |
CIK_0001819810_Genesis Park Acquisition Corp [Member] |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |
Interest Income |  | $ 18,185 |  | $ 10,751 |  | $ 46,643 |  |  |
Net Earnings |  | (707,636) |  | (39,657) |  | (921,610) |  |  |
Net Loss |  | (5,752,200) | $ 260,149 | $ (12,261,549) |  | (5,492,051) |  |  |
Class A Redeemable Ordinary Shares [Member] | CIK_0001819810_Genesis Park Acquisition Corp [Member] |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |
Interest Income | $ 10,751 | 18,185 |  |  |  | 46,643 |  |  |
Net Earnings | $ 10,751 | $ 18,185 |  |  |  | $ 46,643 |  |  |
Basic and diluted | 16,377,622 | 16,377,622 |  |  |  | 16,377,622 |  |  |
Earnings/Income/Loss/Basic and Diluted | $ 0.00 | $ 0.00 |  |  |  | $ 0.00 |  |  |
Non Redeemable Class B Ordinary Shares [Member] | CIK_0001819810_Genesis Park Acquisition Corp [Member] |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |
Net Earnings | $ (12,272,300) |  |  |  |  |  |  |  |
Net Loss | $ (12,272,300) | $ (5,770,385) |  |  |  | $ (5,538,694) |  |  |
Basic and diluted | 3,827,271 | 4,094,406 |  |  |  | 4,094,406 |  |  |
Earnings/Income/Loss/Basic and Diluted | $ (3.20) | $ (1.41) |  |  |  | $ (1.35) |  |  |

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