XOMA Corporation Annual report pursuant to Section 13 and 15(d)

Capital Stock - Rights Offering 2019 (Details)

v3.20.1

Capital Stock - Rights Offering 2019 (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 02, 2019
Sale of stock
Stock issuance costs		$ 317
Preferred stock, stated value (in dollars per share)	$ 0.05	$ 0.05	$ 0.05
BVF
Sale of stock
Ownership percentage on outstanding shares	27.10%	27.10%
Ownership percentage on outstanding shares		55.60%
Common Stock
Sale of stock
Total number of shares issued		1,000,000	354,000
2019 Rights Offering
Sale of stock
Rights offering amount				$ 22,000
Aggregate gross proceeds from issuance of common stock and preferred stock	$ 22,000
Stock issuance costs	200
Net proceeds from issuance of stock	$ 21,800
2019 Rights Offering \| BVF
Sale of stock
Legal fees and expenses		$ 18,000
2019 Rights Offering \| Common Stock
Sale of stock
Total number of shares issued	1,000,000
2019 Rights Offering \| Common Stock \| BVF
Sale of stock
Total number of shares issued	845,463
Purchase price (in dollars per share)	$ 22.00	$ 22.00

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The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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Gross proceeds from issuance of common stock and preferred stock.

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Minority interest ownership percentage after conversion of convertible preferred stock.

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