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Subsequent Event (Details) - Subsequent event - Amprius Holdings - $ / shares shares in Millions | Oct. 23, 2024 | Oct. 22, 2024
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Subsequent Event [Line Items] |  |
Common stock voluntarily liquidated and dissolved (in shares) |  | 65.2
Common stock voluntarily liquidated and dissolved (as percent) |  | 58.60%
Pro rata basis of common stock (in shares) | 57.2 |
Common stock reimbursed (in shares) | 5.5 |
Weighted average exercise price (in dollars per share) | $ 2.10 |
Stock options |  |
Subsequent Event [Line Items] |  |
Issuance of common stock upon exercise of stock options (in shares) | 7.0 |

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- Definition Percentage of Ownership before Transaction + References No definition available. + Details
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Namespace Prefix: | ampx_
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Balance Type: | na
Period Type: | instant

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- Definition Share Distribution to Common Shareholders + References No definition available. + Details
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Namespace Prefix: | ampx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Shares Contributed To The Company And Cancelled + References No definition available. + Details
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Namespace Prefix: | ampx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Shares Owned by Parent, Before Liquidation and Dissolution + References No definition available. + Details
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Namespace Prefix: | ampx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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Balance Type: | na
Period Type: | instant

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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |