Document and entity information. Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Condensed Consolidated Balance Sheets [Abstract] Assets [Abstract] ASSETS Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents-End of period Cash and cash equivalents-Beginning of period Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Total Accounts Receivable, Net, Current Accounts receivable, net of allowances of $124 and $144 as of March 31, 2012 and December 31, 2011, respectively Accounts Receivable, Net, Current, Total Inventory, Net Inventory Inventory, Net, Total Prepaid Expense and Other Assets, Current Prepaid expenses and other Prepaid Expense and Other Assets, Current, Total Assets, Current Total current assets Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Property, Plant and Equipment, Net, Total Other Assets Other assets Other Assets, Total Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts Payable, Current Accounts payable Accounts Payable, Current, Total Accrued Liabilities, Current Accrued liabilities Accrued Liabilities, Current, Total Deferred Revenue, Current Deferred revenues Deferred Revenue, Current, Total Loans Payable, Current Current portion of term loans Loans Payable, Current, Total Convertible Preferred Stock Warrant Liability Convertible preferred stock warrant liability Liabilities, Current Total current liabilities Long-term liabilities: Deferred Revenue, Noncurrent Deferred revenues Deferred Revenue, Noncurrent, Total Warranty Obligations Warranty obligations Other Liabilities Other liabilities Other Liabilities, Total Other Loans Payable, Long-term, Noncurrent Term loans Loans Payable, Noncurrent, Total Convertible Notes Payable, Noncurrent Convertible notes Liabilities, Noncurrent Total long-term liabilities Liabilities Total liabilities Commitments and Contingencies Commitments and contingencies Stockholders' equity: Preferred Stock, Value, Issued Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Convertible preferred stock, $0.00001 par value, 23,559 shares authorized; 22,221 shares issued and outstanding at March 31, 2012 and December 31, 2011; no shares authorized, issued and outstanding pro forma Preferred Stock, Value, Issued, Total Convertible preferred stock, $0.00001 par value, 23,589 and 23,559 shares authorized at March 31, 2012 and December 31, 2011, respectively; 22,221 shares issued and outstanding at March 31, 2012 and December 31, 2011 Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock, $0.00001 par value; 50,000 and 41,410 shares authorized, 1,713 and 1,698 shares issued and outstanding at March 31, 2012 and December 31, 2011, respectively Common Stock, Value, Issued, Total Additional Paid in Capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional paid-in capital Additional Paid in Capital, Total Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Accumulated deficit Retained Earnings (Accumulated Deficit), Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Convertible Preferred Stock [Member] Convertible Preferred Stock [Member] Allowance for Doubtful Accounts Receivable Allowance for Doubtful Accounts Receivable, Ending Balance Allowance for Doubtful Accounts Receivable, Beginning Balance Allowances, accounts receivables Preferred Stock, Par or Stated Value Per Share Convertible preferred stock, par value Preferred Stock, Shares Authorized Convertible preferred stock, shares authorized Preferred Stock, Shares Issued Convertible preferred stock, shares issued Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Convertible preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Issued, Total Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Common stock, shares outstanding Condensed Consolidated Statements Of Operations [Abstract] Revenue, Net Net revenues Revenue, Net, Total Cost of Revenue Cost of revenues Cost of Revenue, Total Gross Profit Gross profit Operating expenses: Research and Development Expense Research and development Research and Development Expense, Total Selling and Marketing Expense Sales and marketing Selling and Marketing Expense, Total General and Administrative Expense General and administrative General and Administrative Expense, Total Operating Expenses Total operating expenses Income (Loss) from Continuing Operations Attributable to Parent Loss from operations Loss from operations Other expense, net: Interest Income, Other Interest income Interest Expense, Other Interest expense Interest expense Interest Expense, Total Other Nonoperating Income (Expense) Other income (expense) Total other income (expense), net Nonoperating Income (Expense) Total other expense, net Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Loss before income taxes Loss before income taxes Income Tax Expense (Benefit) Provision for income taxes Provision for income taxes Income Tax Expense (Benefit), Total Net Income (Loss) Attributable to Parent Net loss attributable to common stockholders Net loss attributable to common stockholders Net loss Net Loss Per Share Attributable To Common Stockholders, Basic And Diluted Net loss per share attributable to common stockholders, basic and diluted Shares Used In Computing Net Loss Per Share Attributable To Common Stockholders, Basic And Diluted Shares used in computing net loss per share attributable to common stockholders, basic and diluted Condensed Consolidated Statements Of Comprehensive Loss [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Net of Tax Other comprehensive income (loss) Other comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss attributable to common stockholders Condensed Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net loss Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Depreciation, Depletion and Amortization, Total Paid-in-Kind Interest Amortization of Financing Costs and Discounts, Total Noncash interest expense Share-based Compensation Stock-based compensation Share-based Compensation, Total Change in Fair Value of Convertible Preferred Stock Warrants Change in fair value of convertible preferred stock warrants Change in fair value of convertible preferred stock warrants Increase (Decrease) in Operating Assets [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Accounts receivable, net Increase (Decrease) in Inventories Inventory Inventory Increase (Decrease) in Inventories, Total Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets, Total Increase (Decrease) in Accounts Payable and Accrued Liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Accounts payable, accrued and other liabilities Increase (Decrease) in Deferred Revenue Deferred revenues Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments for purchase of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds from Issuance of Long-term Debt Proceeds from term loans Proceeds from Issuance of Long-term Debt, Total Payments of Debt Issuance Costs Term loan issuance costs Term loan issuance costs Repayments of Long-term Debt Repayments of term loans Repayments of term loans Repayments of Long-term Debt, Total Repayments of Long-term Capital Lease Obligations Principal payments under capital leases Principal payments under capital leases Proceeds from Stock Options Exercised Proceeds from the exercise of stock options Deferred offering costs. Deferred Offering Cost Deferred offering costs Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Net cash (used in) provided by financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash Effect of exchange rate changes on cash Cash and Cash Equivalents, Period Increase (Decrease) Net decrease in cash and cash equivalents Supplemental disclosures of cash flow information: Supplemental disclosures of cash flow information: Interest Paid Interest Paid, Total Cash paid for interest Noncash Investing and Financing Items [Abstract] Noncash financing and investing activities: Capital Lease Obligations Incurred Assets acquired under capital lease Capital Expenditures Incurred but Not yet Paid Purchases of property and equipment included in accounts payable Deferred Offering Costs Not Yet Paid. Deferred Offering Costs Not Yet Paid Deferred offering costs not yet paid Organization And Description Of Business [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Organization And Description Of Business Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies Inventory [Abstract] Inventory Disclosure [Text Block] Inventory Warranty Obligations [Abstract] Warranty Obligations [TextBlock] Warranty Obligations Long-Term Debt Long-term Debt [Text Block] Long-Term Debt Convertible Facility [Abstract] Debt Disclosure [Text Block] Convertible Facility Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Stockholders' Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Stock-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Net Loss Per Share Attributable To Common Stockholders [Abstract] Earnings Per Share [Text Block] Net Loss Per Share Attributable To Common Stockholders Geographic Information [Abstract] Segment Reporting Disclosure [Text Block] Geographic Information Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions