Overview (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		12 Months Ended		15 Months Ended
	Oct. 02, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Oct. 23, 2024	May 13, 2024	Mar. 01, 2022
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Cash and cash equivalents		$ 55,155	$ 45,761	$ 55,155
Proceeds from issuance of common stock upon exercise of stock warrants net of issuance costs		$ 13,600
Exercise price (in dollars per share)		$ 1.10		$ 1.10		$ 1.10	$ 11.50
Net loss		$ (44,671)	(36,776)
Accumulated deficit		(174,334)	$ (129,663)	$ (174,334)
Amprius Holdings
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Common stock voluntarily liquidated and dissolved (in shares)					65.2
Common stock voluntarily liquidated and dissolved (as percent)					57.2
Pro rata basis of common stock (in shares)					58.60%
Common stock reimbursed (in shares)					5.5
At Market Issuance Sales Agreement
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Aggregate offering price	$ 100,000
Proceeds from the sale of shares of common stock		$ 33,400		$ 33,800