Document and Entity Information [Abstract] Entity Information Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Current Reporting Status Entity Voluntary Filers Entity Filer Category Entity Well-known Seasoned Issuer Entity Public Float Entity Common Stock, Shares Outstanding Document Information Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Note 1 - Business And Significant Accounting Policies Disclosure Note 2 - Revisions To Financial Statements Disclosure Note 3 - Investments Disclosure Note 4 - Property And Equipment Disclosure Note 5 - Intangible Assets Disclosure Note 6 - Accrued And Other Current Liabilities Disclosure Note 7 - Commitments And Contingencies Disclosure Note 8 - Stockholders' Equity Disclosure Note 9 - Restructuring Disclosure Note 10 - Income Taxes Disclosure Note 11 - Net Income (loss ) Per Share Disclosure Note 12 - Customer And Geographic Information Disclosure Note 13 - Fair Value Disclosure Note 14 - Employee Benefit Plan Disclosure Accrued compensation and related benefits Increase Decrease In Employee Related Liabilities [Standard] Note 13 - Fair Value Note 2 - Revisions To Financial Statements Accounts payable Accounts Payable Current [Standard] Net cash provided by financing activities Net Cash Provided By Used In Financing Activities [Standard] Stockholders' equity: Financing activities: Common Stock Total comprehensive income (loss) Stock-based compensation expense Share Based Compensation [Standard] Consolidated Statements Of Operations Accrued and other current liabilities Total current assets Assets Current [Standard] Consolidated Statements Of Cash Flows Note 6 - Accrued And Other Current Liabilities Principal payments on long-term obligations Repayments Of Long Term Debt [Standard] Consolidated Statements Of Stockholders' Equity And Comprehensive Income (Loss) Stock-based compensation expense Cumulative translation adjustment Property and equipment, net Allowance Loss on sale of property and equipment Gain Loss On Disposition Of Assets [Standard] Accounts receivable, net of allowances of $254 in both 2011 and 2010 Accrued compensation and related benefits Long-term income taxes payable Amortization of acquired technology Deferred taxes Weighted average common shares Balances (in shares) Balance (in shares) Shares Issued [Standard] Purchases of treasury stock Payments For Repurchase Of Common Stock [Standard] Amortization of acquired intangible assets Preferred stock, par value Preferred stock, shares outstanding Preferred stock, shares issued Note 8 - Stockholders' Equity Investing activities: Balances Balance Stockholders Equity [Standard] Net cash provided by (used in) investing activities Net Cash Provided By Used In Investing Activities [Standard] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Operating activities: Net cash provided by (used in) operating activities Net Cash Provided By Used In Operating Activities [Standard] Total Tax benefit from employee stock plans Note 4 - Property And Equipment Preferred stock, shares authorized Intangible assets, net Note 7 - Commitments And Contingencies Basic Treasury Stock Total assets Assets [Standard] Preferred stock, $0.00015 par value, 5,000 shares authorized, no shares issued and outstanding Cash and cash equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Cash And Cash Equivalents At Carrying Value [Standard] Note 3 - Investments Total liabilities Liabilities [Standard] Taxes Billings in excess of recognized revenues Billings In Excess Of Cost [Standard] Diluted Weighted Average Number Of Diluted Shares Outstanding [Standard] Cost of design-to-silicon-yield solutions: Basic Weighted Average Number Of Shares Outstanding Basic [Standard] Total cost of design-to-silicon-yield solutions Cost Of Revenue [Standard] Total liabilities and stockholders' equity Liabilities And Stockholders Equity [Standard] LIABILITIES AND STOCKHOLDERS' EQUITY Accumulated other comprehensive loss Commitments and contingencies (Note 7) Total stockholders' equity Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Standard] Common stock, $0.00015 par value, 70,000 shares authorized; shares issued 32,635 and 31,276, respectively; shares outstanding 28,304 and 27,603, respectively Depreciation and amortization Common stock, shares authorized Billings in excess of recognized revenues Common stock, shares issued Common stock, shares outstanding Net increase in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease [Standard] Change in unrealized gain (loss) on investments Accounts receivable, net of allowances Increase Decrease In Accounts Receivable [Standard] Selling, general and administrative Prepaid expenses and other current assets Prepaid Expense And Other Assets [Standard] Direct costs of design-to-silicon-yield solutions Current portion of long-term debt Deferred revenues Deferred Revenue Current [Standard] Note 14 - Employee Benefit Plan Revenue earned during the reporting period from profit sharing and performance incentives based upon customers reaching certain defined operational levels. Gainshare performance incentives Treasury stock shares Amortization of other acquired intangible assets Accrued and other liabilities Common stock, par value Proceeds from employee stock purchase plan Additional paid-in capital Note 12 - Customer And Geographic Information Note 9 - Restructuring Gross profit Gross Profit [Standard] Restructuring charges (credits) Accumulated Other Comprehensive Income (Loss) Note 1 - Business And Significant Accounting Policies Interest Statement [Line Items] ASSETS Purchases of treasury stock Statement Equity Components [Axis] Accumulated Deficit Additional Paid-In Capital Statement [Table] Statement Scenario [Axis] Issuance of common stock in connection with exercise of options Design-to-silicon-yield solutions Other non-current liabilities Scenario Unspecified [Domain] Maturities and sales of available-for-sale securities Issuance of common stock in connection with employee stock purchase plan Interest and other income, net Purchase of treasury stock value in connection with tax withholdings on restricted stock grants Purchases of treasury stock in connection with tax withholdings on restricted stock grants Deferred revenues Increase Decrease In Deferred Revenue [Standard] Purchase of treasury stock shares in connection with tax withholdings on restricted stock grants Purchases of treasury stock in connection with tax withholdings on restricted stock grants (in shares) Other non-current assets Other Assets Noncurrent [Standard] Issuance of common stock in connection with employee stock purchase plan (in shares) Note 11 - Net Income (loss ) Per Share Prepaid expenses and other assets Increase Decrease In Prepaid Deferred Expense And Other Assets [Standard] Net income (loss) Net income (loss) Statement Class Of Stock [Axis] Components of comprehensive income (loss): Gain on debt extinguishment Gains Losses On Extinguishment Of Debt [Standard] Total revenues Revenues [Standard] Research and development Purchases of treasury stock (in shares) Income (loss) from operations Operating Income Loss [Standard] Revenues: Issuance of common stock in connection with exercise of options (in shares) Accumulated deficit Exercise of stock options Vesting of restricted stock units (in shares) Income tax provision Total current liabilities Liabilities Current [Standard] Net income (loss) per share Purchases of property and equipment Payments To Acquire Property Plant And Equipment [Standard] Note 5 - Intangible Assets Accounts payable Changes in operating assets and liabilities: Operating expenses: Note 10 - Income Taxes Total operating expenses Operating Expenses [Standard] Non-current investments Income (loss) before taxes Income Loss From Continuing Operations Before Income Taxes Domestic [Standard] Purchases of treasury stock in connection with tax withholdings on restricted stock grants Other Noncash Expense [Standard] Diluted Treasury stock, at cost, 4,331 and 3,673 shares, respectively Treasury Stock Value [Standard] Supplemental disclosure of cash flow information: Consolidated Balance Sheets Effect of exchange rate changes on cash and cash equivalents