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v3.22.2.2

Forward Warrant Agreement - Additional Information (Detail) - Forward Warrant Agreement [Member] - USD ($) $ / shares in Units, $ in Millions |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021
Rigetti [Member] |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Derivative liabilities | $ 0.2 | $ 0.2 |  |
Derivative asset | 1.5 | 1.5 |  |
Ampere |  |  |  |
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
Ampere | Rigetti [Member] |  |  |  |
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 | $ 0.0001 |  |
Ampere | Rigetti [Member] | 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 | 500,000 |  |
Ampere | Rigetti [Member] | 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 | 500,000 |  |

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