CONDENSED CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS EQUITY (DEFICIT) (UNAUDITED) (Parenthetical) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)
Statement of Stockholders' Equity [Abstract]
Net of acquired private placement warrant	$ 3,014

Business combination and PIPE financing, net of acquired private placement warrant.

No definition available.

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Namespace Prefix:	aeva_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration