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Forward Warrant Agreement - Additional Information (Detail) - Forward Warrant Agreement [Member] - Rigetti [Member] - USD ($) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Jun. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Class of Warrant or Right [Line Items] |  |  |
Derivative liabilities |  | $ 0.2 |
Derivative Liability, Statement of Financial Position [Extensible Enumeration] |  | Liabilities |
Derivative asset |  | $ 2.2 |
Derivative Asset, Statement of Financial Position [Extensible Enumeration] |  | Assets |
Ampere |  |  |
Class of Warrant or Right [Line Items] |  |  |
Proceeds from Issuance of Warrants |  | $ 10.0 |
Stock issued during period number of warrants issued |  | 1,000,000 |
Exercise price of warrants |  | $ 0.0001 |
Warrants Issued |  | 500,000 |
Ampere | Share-based Payment Arrangement, Tranche One [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Business combination consideration to be paid | $ 5.0 |  | $ 5.0
Share based compensation arrangement share based payment award options vested and exercisable | 500,000 |  |
Ampere | Share-based Payment Arrangement, Tranche Two [Member] |  |  |
Class of Warrant or Right [Line Items] |  |  |
Business combination consideration to be paid | $ 5.0 |  |
Share based compensation arrangement share based payment award options vested and exercisable | 500,000 |  |

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