| Cover | Sep. 19, 2024 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 19, 2024 |
| Entity Registrant Name | Amprius Technologies, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-41314 |
| Entity Tax Identification Number | 98-1591811 |
| Entity Address, Address Line One | 1180 Page Ave |
| Entity Address, City or Town | Fremont |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94538 |
| City Area Code | 800 |
| Local Phone Number | 425-8803 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001899287 |
| Amendment Flag | false |
| Common stock | |
| Document Information [Line Items] | |
| Security 12b Title | Common stock, par value $0.0001 per share |
| Trading Symbol | AMPX |
| Security Exchange Name | NYSE |
| Redeemable warrants | |
| Document Information [Line Items] | |
| Security 12b Title | Redeemable warrants, each exercisable for one share of common stock at an exercise price of $11.50 |
| Trading Symbol | AMPX.W |
| Security Exchange Name | NYSE |
