Accounts receivable, net of allowance for doubtful accounts of $302 and $330 at June 30, 2011 and December 31, 2010, respectively Other accumulated comprehensive income (loss) Additional paid-in capital Depreciation expense Accounts receivable, allowance for doubtful accounts Condensed Consolidated Balance Sheets (Unaudited) [Abstract] Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) [Abstract] Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Accounts receivable Inventories Prepaid expenses and other assets Changes in operating assets and liabilities: Accounts payable Accrued expenses Common stock Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total cost of goods sold Cost of Goods and Services Sold Cost of goods sold: Cost of product revenue Cost of service and other revenue Total current liabilities Liabilities, Current Current liabilities: Deferred revenue Deferred Revenue, Current Translation gain (loss) on subsidiaries in foreign currencies Stock-based compensation (Gain) Loss on disposal of fixed assets General and administrative Gross profit Gross Profit Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) [Abstract] Inventories Inventory, Net Total liabilities and stockholders' equity Liabilities and Equity LIABILITIES AND STOCKHOLDERS' EQUITY Revolving line of credit Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Financing activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Investing activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Operating activities Net loss Net loss Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Proceeds from employee stock purchases Other expense, net Operating loss Operating Income (Loss) Translation gain (loss) on subsidiaries denominated in foreign currencies Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Proceeds from private placement of common stock Proceeds from draw on revolving line of credit Property and equipment, net Change to allowance for doubtful accounts Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of treasury stock Payments for Repurchase of Common Stock Accumulated deficit Total revenue Revenue, Net Revenues: Product revenue Service and other revenue Selling and marketing Short-term investments in marketable securities Significant Accounting Policies Significant Accounting Policies [Text Block] Condensed Consolidated Statements of Cash Flows (Unaudited) [Abstract] Issuance costs of private placement Payments of Stock Issuance Costs Stockholders' equity: Total current assets Assets, Current Current assets: Shares used in computing net loss per share, basic & diluted Research and development Total assets Assets Long-term liabilities Other Liabilities, Noncurrent ASSETS Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Treasury stock Treasury Stock, Value Deferred revenue Deposits and other Operating expenses: Total operating expenses Operating Expenses Net Loss Per Share [Abstract] Total stockholders' equity Stockholders' Equity Attributable to Parent Comprehensive loss: Net Loss Per Share Earnings Per Share [Text Block] Adjustments to reconcile net loss to cash used in operating activities: Accounts payable Accounts Payable, Current Accrued expenses Accrued Liabilities, Current Prepaid expenses and other Supplemental Balance Sheet Information [Abstract] Fair Value of Financial Instruments [Abstract] Guarantees Guarantees [Text Block] Significant Accounting Policies [Abstract] Guarantees [Abstract] Supplemental Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Long-term liabilities Net loss per share, basic & diluted Unrealized gain on marketable securities Amendment Flag Current Fiscal Year End Date Document Period End Date Entity [Text Block] Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Interest Expense Net Interest related to total debt, bank fees and issuance fees, less interest income. Interest expense, net