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Basis of Presentation (Policies)
 9 Months Ended
Sep. 30, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Use of Estimates Policy
The preparation of consolidated financial statements in conformity with GAAP requires us to make estimates and judgments that affect amounts reported in the financial statements and accompanying notes. Our significant estimates and judgments include those related to revenue recognition, product returns, warranty obligations, bad debts, inventories, property and equipment, impairment of long-lived assets, amortization of prepaid royalties, valuation of share-based payments, income taxes, litigation and other contingencies. The actual results experienced could differ materially from our estimates.
Receivables, Policy
Accounts receivable are recorded at invoiced amount and do not bear interest when recorded or accrue interest when past due. Accounts receivable are stated net of an allowance for doubtful accounts, which is maintained for estimated losses that may result from the inability of our customers to make required payments.
Inventory, Policy
Inventories consist of finished goods and work-in-process, and are stated at the lower of standard cost (which approximates actual cost on a first-in, first-out basis) or market (net realizable value).
Fair Value of Financial Instruments, Policy
Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Three levels of inputs may be used to measure fair value:
Level 1:
Valuations based on quoted prices in active markets for identical assets and liabilities.
Level 2:
Valuations based on inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
Level 3:
Valuations based on unobservable inputs in which there is little or no market data available, which require the reporting entity to develop its own assumptions.
Co-Development Arrangements, Policy
As amounts become due and payable without recourse, they are offset against research and development expense up to the amount of related costs incurred.