2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited interim consolidated financial statements have been prepared by the Company in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information. It is management’s opinion that the accompanying unaudited interim consolidated financial statements reflect all adjustments (which are normal and recurring) necessary for a fair statement of the results for the interim periods. The financial statements should be read in conjunction with the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2011. The accompanying December 31, 2011 consolidated balance sheet was derived from audited financial statements, but does not include all disclosures required by GAAP.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect (i) the reported amounts of assets and liabilities, (ii) disclosure of contingent assets and liabilities at the dates of the financial statements and (iii) the reported amounts of revenue and expenses during the reporting periods. Actual results could differ from those estimates. The results of operations for the three and nine months ended September 30, 2012 are not necessarily indicative of the results that may be expected for the year ending December 31, 2012.

Basis of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and the Company's European subsidiaries Dyax S.A. and Dyax BV. All inter-company accounts and transactions have been eliminated.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make certain estimates and assumptions that affect the amounts of assets and liabilities reported and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. The significant estimates and assumptions in these financial statements include revenue recognition, product sales allowances, useful lives with respect to long lived assets, valuation of stock options, accrued expenses and tax valuation reserves. Actual results could differ from those estimates.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of cash, cash equivalents, short-term investments and trade accounts receivable. At September 30, 2012 and December 31, 2011, approximately 92% and 61% of the Company's cash, cash equivalents and short-term investments were invested in money market funds backed by U.S. Treasury obligations, U.S. Treasury notes and bills, and obligations of United States government agencies held by one financial institution. The Company maintains balances in various operating accounts in excess of federally insured limits.

The Company provides most of its services and licenses its technology to pharmaceutical and biomedical companies worldwide, and makes all product sales to its distributors. Concentrations of credit risk with respect to trade receivable balances are usually limited on an ongoing basis, due to the diverse number of licensees and collaborators comprising the Company's customer base. As of September 30, 2012, two customers accounted for 45% and 33% of the accounts receivable balance. These two customers also accounted for approximately 43% and 34% of the Company's accounts receivable balance as of December 31, 2011, all of which were collected in the first quarter of 2012.

Cash and Cash Equivalents

All highly liquid investments purchased with an original maturity of ninety days or less are considered to be cash equivalents. Cash and cash equivalents consist principally of cash, money market and U.S. Treasury funds.

Investments

Short-term investments primarily consist of investments with original maturities greater than ninety days and remaining maturities less than one year at period end. The Company has also classified its investments with maturities beyond one year as short-term, based on their highly liquid nature and because such marketable securities represent the investment of cash that is available for current operations. The Company considers its investment portfolio of investments available-for-sale. Accordingly, these investments are recorded at fair value, which is based on quoted market prices. As of September 30, 2012, the Company's investments consisted of U.S. Treasury notes and bills with an amortized cost and estimated fair value of $27.9 million, and had an unrealized gain of $6,000. As of December 31, 2011, the Company's investments consisted of United States Treasury notes and bills with an estimated fair value and amortized cost of $34.9 million, and had an unrealized gain of $7,000, which is recorded in other comprehensive income on the accompanying consolidated balance sheet.

Inventories

Inventories are stated at the lower of cost or market with cost determined under the first-in, first-out, or FIFO, basis. The Company evaluates inventory levels and would write-down inventory that is expected to expire prior to being sold, inventory that has a cost basis in excess of its expected net realizable value, inventory in excess of expected sales requirements, or inventory that fails to meet commercial sale specifications, through a charge to cost of product sales. Included in the cost of inventory are employee stock-based compensation costs capitalized under Accounting Standards Codification (ASC) 718.

Fixed Assets

Property and equipment are recorded at cost and depreciated over the estimated useful lives of the related assets using the straight-line method. Laboratory and production equipment, furniture and office equipment are depreciated over a three to seven year period. Leasehold improvements are stated at cost and are amortized over the lesser of the non-cancelable term of the related lease or their estimated useful lives. Leased equipment is amortized over the lesser of the life of the lease or their estimated useful lives. Maintenance and repairs are charged to expense as incurred. When assets are retired or otherwise disposed of, the cost of these assets and related accumulated depreciation and amortization are eliminated from the balance sheet and any resulting gains or losses are included in operations in the period of disposal.

The Company records all proceeds received from the lessor for tenant improvements under the terms of its operating lease as deferred rent. These amounts are amortized on a straight-line basis over the term of the lease as an offset to rent expense.

Impairment of Long-Lived Assets

The Company’s long-lived assets, consisting primarily of fixed assets, are reviewed for impairment whenever events or changes in business circumstances indicate that the carrying amount of assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Each impairment test is based on a comparison of the undiscounted cash flow to the recorded value of the asset. If impairment is indicated, the asset is written down to its estimated fair value on a discounted cash flow basis.

Revenue Recognition

The Company’s principal sources of revenue are product sales of KALBITOR, license fees, funding for research and development, and milestones and royalties derived from collaboration and license agreements. In all instances, revenue is recognized only when the price is fixed or determinable, persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, collectability of the resulting receivable is reasonably assured and the Company has no further performance obligations.

Product Sales and Allowances

Product Sales. Product sales are generated from the sale of KALBITOR to the Company’s wholesale and specialty distributors, and are recorded upon delivery when title and risk of loss have passed to the customer. Product sales are recorded net of applicable reserves for trade prompt pay and other discounts, government rebates, patient assistance programs, product returns and other applicable allowances.

Product Sales Allowances. The Company establishes reserves for trade distributor and prompt pay discounts, government rebates, patient assistance programs, product returns and other applicable allowances. Reserves established for these discounts and allowances are classified as a reduction of accounts receivable (if the amount is payable to the customer) or a liability (if the amount is payable to a party other than the customer).

Allowances against receivable balances primarily relate to prompt payment discounts and are recorded at the time of sale, resulting in a reduction in product sales revenue. Accruals related to government rebates, patient financial assistance programs, product returns and other applicable allowances are recognized at the time of sale, resulting in a reduction in product sales revenue and the recording of an increase in accrued expenses.

The Company maintains service contracts with its distributors. Accounting standards related to consideration given by a vendor to a customer, including a reseller of a vendor’s product, specify that each consideration given by a vendor to a customer is presumed to be a reduction of the selling price. Consideration should be characterized as a cost if the company receives, or will receive, an identifiable benefit in exchange for the consideration, and fair value of the benefit can be reasonably estimated. The Company has established that patient support services are at fair value and represent a separate and identifiable benefit related to these services and, accordingly, has classified them as selling, general and administrative expense.

Prompt Payment and Other Discounts. The Company offers a prompt payment discount to its United States distributors. Since the Company expects that these distributors will take advantage of this discount, the Company accrues 100% of the prompt payment discount that is based on the gross amount of each invoice, at the time of sale. The accrual is adjusted quarterly to reflect actual earned discounts.

Government Rebates and Chargebacks. The Company estimates reductions to product sales for Medicaid and Veterans' Administration (VA) programs and the Medicare Part D Coverage Gap Program, as well as with respect to certain other qualifying federal and state government programs. The Company estimates the amount of these reductions based on KALBITOR patient data and actual sales data. These allowances are adjusted each period based on actual experience.

Medicaid rebate reserves relate to the Company’s estimated obligations to states under the established reimbursement arrangements of each applicable state. Rebate accruals are recorded during the same period in which the related product sales are recognized. Actual rebate amounts are determined at the time of claim by the state, and the Company will generally make cash payments for such amounts after receiving billings from the state.

VA rebates or chargeback reserves represent the Company’s estimated obligations resulting from contractual commitments to sell products to qualified healthcare providers at a price lower than the list price charged to the Company’s distributor. The distributor will charge the Company for the difference between what the distributor pays for the product and the ultimate selling price to the qualified healthcare provider. Rebate accruals are established during the same period in which the related product sales are recognized. Actual chargeback amounts for Public Health Service are determined at the time of resale to the qualified healthcare provider from the distributor, and the Company will generally issue credits for such amounts after receiving notification from the distributor.

The Company offers a financial assistance program, which involves the use of a patient voucher, for qualified KALBITOR patients in order to aid a patient’s access to KALBITOR. The Company estimates its liability from this voucher program based on actual redemption rates.

Although allowances and accruals are recorded at the time of product sale, certain rebates are typically paid out, on average, up to six months or longer after the sale. Reserve estimates are evaluated quarterly and if necessary, adjusted to reflect actual results. Any such adjustments will be reflected in the Company’s operating results in the period of the adjustment.

Product Returns. Allowances for product returns are recorded during the period in which the related product sales are recognized, resulting in a reduction to product revenue. The Company does not provide its distributors with a general right of product return. It permits returns if the product is damaged or defective when received by customers or if the product has expired. The Company estimates product returns based upon historical trends in the pharmaceutical industry, trends for similar products sold by others and data provided by a distributor.

Development and License Fee Revenues

Collaboration Agreements. The Company enters into collaboration agreements with other companies for the research and development of therapeutic, diagnostic and separations products. The terms of the agreements may include non-refundable signing and licensing fees, funding for research and development, payments related to manufacturing services, milestone payments and royalties on any product sales derived from collaborations. These multiple element arrangements are analyzed to determine how the deliverables, which often include license and performance obligations such as research, steering committee and manufacturing services, are separated into units of accounting.

Before January 1, 2011, the Company evaluated license arrangements with multiple elements in accordance with ASC, 605-25 Revenue Recognition – Multiple-Element Arrangements. In October 2009, the FASB issued ASU 2009-13 Revenue Arrangements with Multiple Deliverables, or ASU 2009-13, which amended the accounting standards for certain multiple element arrangements to:

●	Provide updated guidance on whether multiple elements exist, how the elements in an arrangement should be separated and how the arrangement considerations should be allocated to the separate elements;

●

Require an entity to allocate arrangement consideration to each element based on a selling price hierarchy, also called the relative selling price method, where the selling price for an element is based on vendor-specific objective evidence (VSOE), if available; vendor objective evidence (VOE), if available and VSOE is not available; or the best estimate of selling price (BESP), if neither VSOE or VOE is available;

●	Eliminate the use of the residual method and require an entity to allocate arrangement consideration using the selling price hierarchy.

The Company evaluates all deliverables within an arrangement to determine whether or not they provide value to the licensee on a stand-alone basis. Based on this evaluation, the deliverables are separated into units of accounting. If VSOE or VOE is not available to determine the fair value of a deliverable, the Company determines the best estimate of selling price associated with the deliverable. The arrangement consideration, including upfront license fees and funding for research and development, is allocated to the separate units based on relative fair value.

VSOE is based on the price charged when an element is sold separately and represents the actual price charged for that deliverable. When VSOE cannot be established, the Company attempts to establish the selling price of the elements of a license arrangement based on VOE. VOE is determined based on third party evidence for similar deliverables when sold separately. In circumstances when the Company charges a licensee for pass-through costs paid to external vendors for development services, these costs represent VOE.

When the Company is unable to establish the selling price of an element using VSOE or VOE, management determines BESP for that element. The objective of BESP is to determine the price at which the Company would transact a sale if the element within the license agreement was sold on a stand-alone basis. The Company’s process for establishing BESP involves management’s judgment and considers multiple factors including discounted cash flows, estimated direct expenses and other costs and available data.

Based on the value allocated to each unit of accounting within an arrangement, upfront fees and other guaranteed payments are allocated to each unit based on relative value. The appropriate revenue recognition method is applied to each unit and revenue is accordingly recognized as each unit is delivered.

For agreements entered into prior to 2011, revenue related to upfront license fees was spread over the full period of performance under the agreement, unless the license was determined to provide value to the licensee on a stand-alone basis and the fair value of the undelivered performance obligations, typically including research or steering committee services was determinable.

Steering committee services that were not inconsequential or perfunctory and were determined to be performance obligations were combined with other research services or performance obligations required under an arrangement, if any, to determine the level of effort required in an arrangement and the period over which the Company expected to complete its aggregate performance obligations.

Whenever the Company determined that an arrangement should be accounted for as a single unit of accounting, it determined the period over which the performance obligations would be completed. Revenue is recognized using either an efforts-based or time-based (i.e. straight-line) proportional performance method. The Company recognizes revenue using an efforts-based proportional performance method when the level of effort required to complete its performance obligations under an arrangement can be reasonably estimated and such performance obligations are provided on a best-efforts basis. Direct labor hours or full-time equivalents are typically used as the measurement of performance.

If the Company cannot reasonably estimate the level of effort to complete its performance obligations under an arrangement, then revenue under the arrangement is recognized on a straight-line basis over the period the Company is expected to complete its performance obligations.

Many of the Company's collaboration agreements entitle it to additional payments upon the achievement of performance-based milestones. For all milestones achieved prior to 2011, substantive milestones were included in the Company's revenue model when achievement of the milestone was achieved. Milestones that were tied to regulatory approval were not considered probable of being achieved until such approval was received. All milestones achieved after January 1, 2011 which are determined to be substantive milestones are recognized as revenue in the period in which they are met in accordance with Accounting Standards Update (ASU) No. 2010-17, Revenue Recognition – Milestone Method. Milestones tied to counter-party performance are not included in the Company’s revenue model until performance conditions are met. Milestones determined to be non-substantive are allocated to each unit of accounting within an arrangement when met. The allocation of the milestone to each unit is based on relative value and revenue related to each unit is recognized accordingly.

Royalty revenue is recognized upon the sale of the related products provided the Company has no remaining performance obligations under the arrangement.

Costs of revenues related to product development and license fees are classified as research and development in the consolidated statements of operations and comprehensive loss.

Library Licenses. Standard terms of the proprietary phage display library agreements generally include non-refundable signing fees, license maintenance fees, development milestone payments, product license payments and royalties on product sales. Signing fees and maintenance fees are generally recognized on a straight line basis over the term of the agreement as deliverables within these arrangements are determined to not provide the licensee with value on a stand-alone basis and therefore are accounted for as a single unit of accounting. As milestones are achieved under a phage display library license, a portion of the milestone payment, equal to the percentage of the performance period completed when the milestone is achieved, multiplied by the amount of the milestone payment, will be recognized. The remaining portion of the milestone will be recognized over the remaining performance period on a straight-line basis. Milestone payments under these license arrangements are recognized when the milestone is achieved if the Company has no future obligations under the license. Product license payments, which are optional to the licensee, are substantive and therefore are excluded from the initial allocation of the arrangement consideration. These payments are recognized as revenue when the license is issued upon exercise of the licensee’s option, if the Company has no future obligations under the agreement. If there are future obligations under the agreement, product license payments are recognized as revenue only to the extent of the fair value of the license. Amounts paid in excess of fair value are recognized in a manner similar to milestone payments. Royalty revenue is recognized upon the sale of the related products provided the Company has no remaining performance obligations under the arrangement.

Payments received that have not met the appropriate criteria for revenue recognition are recorded as deferred revenue.

Patent Licenses. The Company previously licensed its phage display patents on a non-exclusive basis to third parties for use in connection with the research and development of therapeutic, diagnostic, and other products. The last of these patents will expire in November 2012. Even after patent expiration, the Company generally remains eligible under these patent licenses to receive milestones and/or royalties for products discovered prior to patent expiration, although certain existing patent licenses will no longer have a royalty obligation. The Company does not expect the expiration of these patents to have a material impact on its LFRP business.

Standard terms of the patent rights agreements include non-refundable signing fees, non-refundable license maintenance fees, development milestone payments and/or royalties on product sales. Signing fees and maintenance fees are generally recognized on a straight line basis over the term of the agreement or through the date of patent expiry, if shorter, except that in the case of perpetual patent licenses for which fees were recognized immediately if it was determined that the Company had no future obligations under the agreement and the payments were made upfront. Milestones are recognized as revenue in the period in which the milestone is achieved, and royalty revenue is recognized upon the sale of the related products, since the Company has no remaining performance obligations under the agreement.

Cost of Product Sales

Cost of product sales includes costs to procure, manufacture and distribute KALBITOR and manufacturing royalties. Costs associated with the manufacture of KALBITOR prior to regulatory approval in the United States were expensed when incurred as a research and development cost and accordingly, KALBITOR units sold during the three and nine months ended September 30, 2012 and 2011 do not include the full cost of drug manufacturing.

Research and Development

Research and development costs include all direct costs, including salaries and benefits for research and development personnel, outside consultants, costs of clinical trials, sponsored research, clinical trials insurance, other outside costs, depreciation and facility costs related to the development of drug candidates.

Income Taxes

The Company utilizes the asset and liability method of accounting for income taxes in accordance with ASC 740. Under this method, deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the carrying amounts and the tax basis of assets and liabilities using the enacted statutory tax rates. At September 30, 2012 and December 31, 2011, there were no unrecognized tax benefits.

The Company accounts for uncertain tax positions using a "more-likely-than-not" threshold for recognizing and resolving uncertain tax positions. The evaluation of uncertain tax positions is based on factors that include, but are not limited to, changes in tax law, the measurement of tax positions taken or expected to be taken in tax returns, the effective settlement of matters subject to audit, new audit activity and changes in facts or circumstances related to a tax position. The Company evaluates uncertain tax positions on a quarterly basis and adjusts the level of the liability to reflect any subsequent changes in the relevant facts surrounding the uncertain positions.

Translation of Foreign Currencies

Assets and liabilities of the Company's foreign subsidiaries are translated at period end exchange rates. Amounts included in the statements of operations are translated at the average exchange rate for the period. All currency translation adjustments are recorded to other income (expense) in the consolidated statement of operations. For the three and nine months ending September 30, 2012 the Company recorded other income of $10,000 and other expense of $3,000, respectively, for the translation of foreign currency. For the three and nine months ending September 30, 2011 the Company recorded other expense of $32,000 and other income of $15,000, respectively, for the translation of foreign currency.

Share-Based Compensation

The Company’s share-based compensation program consists of share-based awards granted to employees in the form of stock options and restricted stock units, as well as its 1998 Employee Stock Purchase Plan, as amended (the Purchase Plan). The Company’s share-based compensation expense is recorded in accordance with ASC 718.

Income or Loss Per Share

The Company presents two earnings or loss per share (EPS) amounts, basic and diluted in accordance with ASC 260. Basic earnings or loss per share is computed using the weighted average number of shares of common stock outstanding. Diluted net loss per share does not differ from basic net loss per share since potential common shares from the exercise of stock options, warrants or rights under the Purchase Plan are anti-dilutive for the periods ended September 30, 2012 and 2011 and, therefore, are excluded from the calculation of diluted net loss per share.

Stock options and warrants to purchase a total of 11,379,953 and 11,682,969 shares of common stock were outstanding at September 30, 2012 and 2011, respectively.

Comprehensive Income (Loss)

The Company accounts for comprehensive income (loss) under ASC 220, Comprehensive Income, which established standards for reporting and displaying comprehensive income (loss) and its components in a full set of general purpose financial statements. The statement required that all components of comprehensive income (loss) be reported in a financial statement that is displayed with the same prominence as other financial statements.

Business Segments

The Company discloses business segments under ASC 280, Segment Reporting. The statement established standards for reporting information about operating segments and disclosures about products and services, geographic areas and major customers. The Company operates as one business segment within predominantly one geographic area.

Recent Accounting Pronouncements

From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (FASB) or other standard setting bodies, which are adopted by the Company as of the specified effective date. Unless otherwise discussed, the Company believes that the impact of recently issued standards that are not yet effective will not have a material impact on its financial position or results of operations upon adoption.

In December 2011, the FASB issued an amendment to the accounting guidance for disclosure of offsetting assets and liabilities and related arrangements. The amendment expands the disclosure requirements in that entities will be required to disclose both gross information and net information about both instruments and transactions eligible for offset in the statement of financial position and instruments and transactions subject to an agreement similar to a master netting arrangement. The amendment is effective for fiscal years, and interim periods within those years, beginning on or after January 1, 2013, and shall be applied retrospectively. The Company does not expect the adoption of this accounting pronouncement to have a material impact on its financial statements.