Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Mar. 16, 2023	Jun. 30, 2022
Document Information [Line Items]
Document Type	10-K
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-04321
Entity Registrant Name	AMPRIUS TECHNOLOGIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	98-1591811
Entity Address, Address Line One	1180 Page Avenue
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
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 183.9
Entity Common Stock, Shares Outstanding		84,630,114
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for its 2023 Annual Meeting of Stockholders, or Proxy Statement, to be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, are incorporated by reference in Part III where indicated. Except with respect to information specifically incorporated by reference in this Annual Report, the Proxy Statement shall not be deemed to be filed as part hereof.
Entity Central Index Key	0001899287
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common stock, $0.0001 par value
Trading Symbol	AMPX
Security Exchange Name	NYSE
Redeemable Warrants
Document Information [Line Items]
Title of 12(b) Security	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