CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Previously Reported	Adjustment	Common Stock	Common Stock Previously Reported	Common Stock Revision of Prior Period, Adjustment	Additional Paid-in Capital	Additional Paid-in Capital Previously Reported	Additional Paid-in Capital Revision of Prior Period, Adjustment	Accumulated Deficit	Accumulated Deficit Previously Reported	Accumulated Deficit Adjustment
Beginning Balance (in shares) at Dec. 31, 2021				65,772,001	45,176,145	20,595,856
Beginning Balance at Dec. 31, 2021	$ 13,858	$ 13,858	$ (154)	$ 7	$ 1	$ 6	$ 89,252	$ 89,258	$ (6)	$ (75,401)	$ (75,401)	$ (154)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)				4,549
Exercise of stock options	8						8
Capital contributions from Amprius Holdings	247						247
Stock-based compensation	350						350
Contribution from Amprius Holdings related to stock-based compensation	106						106
Net loss	(2,878)									(2,878)
Ending Balance (in shares) at Mar. 31, 2022				65,776,550
Ending Balance at Mar. 31, 2022	$ 11,537			$ 7			89,963			(78,433)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-02 [Member]
Beginning Balance (in shares) at Dec. 31, 2022	84,610,114			84,610,114
Beginning Balance at Dec. 31, 2022	$ 73,033			$ 8			165,912			(92,887)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in connection with a stock purchase agreement, net of issuance cost (in shares)				331,351
Issuance of common stock in connection with a stock purchase agreement, net of issuance cost	2,376						2,376
Exercise of stock options (in shares)				30,000
Exercise of stock options	2						2
Stock-based compensation	723						723
Contribution from Amprius Holdings related to stock-based compensation	3						3
Net loss	$ (9,102)									(9,102)
Ending Balance (in shares) at Mar. 31, 2023	84,610,114			84,971,465
Ending Balance at Mar. 31, 2023	$ 67,035			$ 8			$ 169,016			$ (101,989)