Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies

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Basis of Presentation and Significant Accounting Policies
3 Months Ended
Mar. 31, 2013
Basis of Presentation and Significant Accounting Policies [Abstract]  
Basis of Presentation and Significant Accounting Policies
2.  Basis of Presentation and Significant Accounting Policies

Basis of Presentation

The condensed consolidated financial statements include the accounts of XOMA and its subsidiaries. All intercompany accounts and transactions were eliminated during consolidation. The unaudited financial statements were prepared in accordance with accounting principles generally accepted in the United States for interim financial information and with the instructions to Form 10-Q. These financial statements and related disclosures have been prepared with the assumption that users of the interim financial information have read or have access to the audited financial statements for the preceding fiscal year. Accordingly, these statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2012, filed with the U.S. Securities and Exchange Commission ("SEC") on March 12, 2013.

In management's opinion, the unaudited condensed consolidated financial statements include all adjustments, consisting only of normal recurring adjustments, which are necessary to present fairly the Company's consolidated financial position as of March 31, 2013, the consolidated results of the Company's operations and the Company's cash flows for the three months ended March 31, 2013 and 2012. The interim results of operations are not necessarily indicative of the results that may occur for the full fiscal year or future periods.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosures. On an on-going basis, management evaluates its estimates including, but not limited to, those related to contingent warrant liabilities, revenue recognition, research and development expense, long-lived assets, derivative instruments, stock-based compensation, and restructuring liabilities. The Company bases its estimates on historical experience and on various other market-specific and other relevant assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ significantly from these estimates, such as the Company's billing under government contracts. Under the Company's contracts with the National Institute of Allergy and Infectious Diseases ("NIAID"), a part of the National Institutes of Health ("NIH"), the Company bills using NIH provisional rates and thus are subject to future audits at the discretion of NIAID's contracting office. These audits can result in adjustments to revenues previously reported.

Long-lived Assets

The Company reviews the carrying values and depreciation lives of its long-lived assets whenever events or changes in circumstances indicate that the asset may not be recoverable. An impairment loss is recognized when the estimated future net cash flows expected to result from the use of an asset is less than its carrying amount. Long-lived assets include property and equipment and building and leasehold improvements. During the three months ended March 31, 2012, the Company recorded an impairment loss of $0.8 million and accelerated depreciation of $0.9 million on long-lived assets in connection with the Company's 2012 streamlining plan. See Note 5: Streamlining and Restructuring Charges for additional disclosure on the 2012 streamlining plan.

Concentration of Risk

Cash equivalents and receivables are financial instruments, which potentially subject the Company to concentrations of credit risk, as well as liquidity risk for certain cash equivalents such as money market funds. The Company has not encountered such issues during the first quarter of 2013.

The Company has not experienced any significant credit losses and does not generally require collateral on receivables. For the three months ended March 31, 2013, two customers represented 79% and 18% of total revenue and 56% and 39% of the accounts receivable balance.

For the three months ended March 31, 2012, these two customers represented 49% and 40% of total revenues. As of December 31, 2012, there were receivables outstanding from these two customers representing 58% and 35% of the accounts receivable balance.

Newly Adopted Accounting Pronouncements

In February 2013, Accounting Standards Codification Topic 220, Comprehensive Income was amended to require companies to report, in one place, information about reclassifications out of accumulated other comprehensive income. Accordingly, a company can present this information on the face of the financial statements, if certain requirements are met, or the information must be presented in the notes to the financial statements. The Company adopted this guidance as of January 1, 2013, on a retrospective basis and the items reclassified out of accumulated other comprehensive income are not material for all periods presented.