XOMA Corporation Quarterly report pursuant to Section 13 or 15(d)

Capital Stock - Series X and Series Y Convertible Preferred Stock (Details)

v3.21.2

Capital Stock - Series X and Series Y Convertible Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Feb. 28, 2017	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2021
Series X And Series Y Convertible Preferred Stock [Member]
Sale of stock
Number of shares issued for each share of convertible preferred stock that is converted		1,000
Series X Convertible Preferred Stock [Member]
Sale of stock
Shares issued (in shares)			5,003
Preferred stock, shares outstanding (in shares)				5,003
Preferred stock conversion price per share			$ 4.03
Fair value of common stock amount exceeded purchase price of convertible preferred stock	$ 5.6
Series Y Convertible Preferred Stock [Member]
Sale of stock
Shares issued (in shares)		1,252.772
Preferred stock, shares outstanding (in shares)				0
Preferred stock conversion price per share		$ 13.00

- Definition

Number of shares issued for each share of convertible preferred stock that is converted.

+ References

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- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

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- Definition

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- Definition

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+ References

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- Definition

Fair value of common stock amount exceeded allocated purchase price of convertible preferred stock.

+ References

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- Definition

Preferred stock conversion price per share.

+ References

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