Business Combination - Reverse Recapitalization (Details) shares in Thousands, $ in Thousands	Sep. 14, 2022 USD ($) shares
Business Acquisition [Line Items]
Common stock - Legacy Amprius (in shares)	65,777
Common stock - PIPE Investment (in shares)	2,052
Total shares of common stock immediately after Business Combination (in shares)	84,169
Proceeds from reverse recapitalization transaction \| $	$ 70,938
Kensington
Business Acquisition [Line Items]
Common stock - Kensington (in shares)	16,340

Number of new stock issued during the period.

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-Name Accounting Standards Codification
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