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Equity (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 28, 2021 shares	Mar. 31, 2021 USD ($) shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) vote $ / shares shares	Aug. 20, 2021 $ / shares
Stockholders' Equity And Temporary Equity [Line Items]
Stock authorized (in shares)			1,010,000,000
Common stock, authorized (in shares)			1,000,000,000	1,000,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, authorized (in shares)			10,000,000	10,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.0001	$ 0.0001	$ 0.0001
Number of votes per share | vote				1
Legacy Xos preferred stock authorized (in shares)			27,041,000	27,041,000
Issuance of preferred shares (in shares)	76,471		49,518,000	2,762,000
Number of warrants issued (in shares)				1
Conversion of interest payable on convertible notes (in shares)				319,411
Issuance of Legacy Xos Preferred Stock, incl. note conversion | $			$ 66,701	$ 9,570
Temporary equity, conversion of convertible securities | $			$ (79,708)
Temporary equity, conversion of convertible securities (in shares)			(52,905,000)
Legacy Xos
Stockholders' Equity And Temporary Equity [Line Items]
Legacy Xos preferred stock authorized (in shares)				25,794,475
Issuance of preferred shares (in shares)		3,739,846		1,411,764
Number of warrants issued (in shares)				1
Conversion of interest payable on convertible notes (in shares)				319,411
Issuance of Legacy Xos Preferred Stock, incl. note conversion | $		$ 31,800		$ 9,600
Temporary equity, subscribed but unissued, subscriptions receivable (in shares) | $				2,400
Temporary equity, conversion of convertible securities | $				21,500
Conversion of convertible securities, accrued interest | $				$ 2,500
Temporary equity, conversion of convertible securities (in shares)				21,570,308
Reduction of fair value of non-voting shares, percentage				3.00%

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- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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