Forward Warrant Agreement - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	Oct. 31, 2021 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) shares	Dec. 31, 2022 shares	Dec. 31, 2023	Sep. 30, 2023	Mar. 01, 2022 $ / shares
Class of Warrant or Right [Line Items]
Exercise price of warrants | $ / shares						$ 11.50
Maximum | Estimated Probability of Occurrence | Forward Warrant
Class of Warrant or Right [Line Items]
Warrants and rights outstanding, measurement input					0.50
Minimum | Estimated Probability of Occurrence | Forward Warrant
Class of Warrant or Right [Line Items]
Warrants and rights outstanding, measurement input					0
Forward Warrant Agreement | Maximum | Estimated Probability of Occurrence
Class of Warrant or Right [Line Items]
Warrants and rights outstanding, measurement input				0.50
Forward Warrant Agreement | Minimum | Estimated Probability of Occurrence
Class of Warrant or Right [Line Items]
Warrants and rights outstanding, measurement input				0
Forward Warrant Agreement | Ampere | Rigetti
Class of Warrant or Right [Line Items]
Proceeds from Issuance of Warrants	$ 10.0
Stock issued during period number of warrants issued | shares	1,000,000
Exercise price of warrants | $ / shares	$ 0.0001
Additional consideration no longer payable		$ 5.0
Warrants Issued | shares			500,000
Forward Warrant Agreement | Ampere | Rigetti | Share-based Payment Arrangement, Tranche One
Class of Warrant or Right [Line Items]
Business combination consideration to be paid		$ 5.0
Warrants Issued | shares		500,000
Forward Warrant Agreement | Ampere | Rigetti | Share-based Payment Arrangement, Tranche Two
Class of Warrant or Right [Line Items]
Business combination consideration to be paid		$ 5.0