Long-term Debt, by Current and Noncurrent [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term loans [Member] Secured Debt [Member] Equipment Financing Facility [Member] Equipment Financing Facility [Member] Equipment financing facility. Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of long-term debt Long-term Debt, Current and Noncurrent [Abstract] Total debt Long-term Debt Less current portion Long-term Debt, Current Maturities Long-term portion Long-term Debt, Excluding Current Maturities Unamortized discount Debt Instrument, Unamortized Discount Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of summary of stock option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of restricted stock unit activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of components of stock-based compensation expense in the consolidated statement of operations, by report line Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expense by award type Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of valuation assumptions of stock options Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Total unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Weighted-average recognition period for unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair value, measurements, recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Asset Derivatives Assets, Fair Value Disclosure [Abstract] Foreign currency forward contracts (Level 2) Foreign Currency Contract, Asset, Fair Value Disclosure Liability Derivatives Liabilities, Fair Value Disclosure [Abstract] Foreign currency forward contracts (Level 2) Foreign Currency Contracts, Liability, Fair Value Disclosure Derivative [Table] Derivative [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not designated as hedging instrument [Member] Not Designated as Hedging Instrument [Member] Derivative Instrument Risk [Axis] Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Derivative Contract Type [Domain] Foreign exchange forward [Member] Foreign Exchange Forward [Member] Derivative [Line Items] Derivative [Line Items] Notional amount of foreign currency derivatives Notional Amount of Foreign Currency Derivatives Gain (loss) on foreign currency derivative instruments Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Wells Fargo Bank [Member] Wells Fargo Bank [Member] Wells Fargo Bank. Hercules Technology Growth Capital Inc [Member] Hercules Technology Growth Capital, Inc. Revolving Credit Facility [Member] Revolving Credit Facility [Member] Secured Debt [Member] Equipment Financing Facility [Member] Number of debt agreements Line of Credit, Number of Debt Agreements Line of Credit, Number of Debt Agreements Credit line facility Line of Credit Facility, Maximum Borrowing Capacity Debt instrument additional borrowing amount Debt Instrument, Increase, Additional Borrowings Product Warranties Disclosures [Abstract] Changes in the Company's product warranty liability Schedule of Product Warranty Liability [Table Text Block] Inventory Disclosure [Abstract] Schedule of inventory Inventory, Net [Abstract] Raw materials Inventory, Raw Materials, Gross Finished goods Inventory, Finished Goods, Gross Total inventory Inventory, Net Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation, Consolidation and Related Party Transactions [Table] Basis of Presentation, Consolidation and Related Party Transactions [Table] Basis of Presentation, Consolidation and Related Party Transactions [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] KPCB Holdings, Inc. [Member] KPCB Holdings, Inc. [Member] KPCB Holdings, Inc. [Member] Basis of Presentation, Consolidation and Related Party Transactions [Line Items] Basis of Presentation, Consolidation and Related Party Transactions [Line Items] [Line Items] for Basis of Presentation, Consolidation and Related Party Transactions [Table] Common stock, shares issued Stock Issued During Period, Shares, New Issues Stock issued during period offering price Share Price Proceeds from the sale of common stock Proceeds from Issuance Initial Public Offering Underwriters Discounts and Commissions Underwriters Discounts and Commissions Underwriters discounts and commissions. Other estimated offering costs Other Estimated Offering Costs Other estimated offering costs. Convertible preferred stock, shares outstanding Preferred Stock, Shares Outstanding Conversion of convertible preferred stock into common stock Conversion of Convertible Preferred Stock into Common Stock Conversion of convertible preferred stock into common stock. Convertible notes, outstanding balance of principal and accrued paid in kind interest Convertible Notes Payable Conversion of notes into common stock Stock Issued During Period Shares Conversion of Convertible Securities and Paid in Kind Interest Stock issued during period shares conversion of convertible securities and paid in kind interest. Conversion price of convertible notes Debt Instrument, Convertible, Conversion Price Revenue from related parties Revenue from Related Parties Changes in the Company's product warranty liability Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Balance, at beginning of period Product Warranty Accrual Warranty expense Standard Product Warranty Accrual Settlements Standard Product Warranty Accrual, Payments Balance, at end of period Less current portion Product Warranty Accrual, Current Long-term portion Product Warranty Accrual, Noncurrent Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Statement of Other Comprehensive Income [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Net loss attributable to common stockholders Net Income (Loss) Attributable to Parent Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Comprehensive loss attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent LONG-TERM DEBT Long-term Debt [Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted stock units [Member] Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding at December 31, 2012 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding at March 31, 2013 (in shares) Weighted Average Fair Value per Share at Grant Date Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Outstanding at December 31, 2012 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Canceled (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding at March 31, 2013 (in usd per share) WARRANTY OBLIGATIONS Product Warranty Disclosure [Text Block] Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Income Statement [Abstract] Net revenues Revenue, Net Cost of revenues Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses Loss from operations Income (Loss) from Continuing Operations Attributable to Parent Other income (expense), net: Other Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Other income (expense) Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net loss attributable to common stockholders Net loss per share attributable to common stockholders, basic and diluted (usd per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Shares used in computing net loss per share attributable to common stockholders, basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Schedule of inventory Schedule of Inventory, Current [Table Text Block] Number of Shares Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options outstanding—December 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Options outstanding—March 31, 2013 (in shares) Weighted- Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Options outstanding—December 31, 2012 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Options outstanding—March 31, 2013 (in usd per share) Earnings Per Share [Abstract] NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS Earnings Per Share [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options to purchase common stock [Member] Stock Options [Member] Restricted stock units [Member] Warrants to purchase common stock [Member] Warrant [Member] Warrants to purchase convertible preferred stock [Member] Warrant Convertible Common Stock [Member] Warrant convertible common stock. Convertible preferred stock [Member] Convertible Preferred Stock [Member] Convertible notes [Member] Convertible Debt Securities [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] The potential common shares outstanding that were excluded from the computation of diluted net loss per share attributable to common stockholders Antidilutive Securities [Abstract] Antidilutive securities. Total Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of financial instruments that are measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Overview and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Non-cash interest expense Amortization of Financing Costs and Discounts Stock-based compensation Share-based Compensation Change in fair value of convertible preferred stock warrants Unrealized Gain (Loss) on Derivatives Changes in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable, accrued and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenues Increase (Decrease) in Deferred Revenue Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from term loans and debt Proceeds from Issuance of Long-term Debt Repayments of term loans Repayments of Long-term Debt Principal payments under capital leases Repayments of Long-term Capital Lease Obligations Proceeds from the exercise of stock options Proceeds from Stock Options Exercised Payment of offering costs Payments of Stock Issuance Costs Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents—Beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents—End of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Noncash financing and investing activities: Noncash Investing and Financing Items [Abstract] Purchases of property and equipment included in accounts payable Capital Expenditures Incurred but Not yet Paid Offering costs not yet paid Offering Costs Not Yet Paid Offering costs not yet paid. Stock options [Member] The fair value of each option granted during the periods Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Annual risk-free rate of return Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of allowances of $1,024 and $1,177, respectively Accounts Receivable, Net, Current Inventory Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Deferred revenues Deferred Revenue, Current Current portion of term loans Loans Payable, Current Total current liabilities Liabilities, Current Long-term liabilities: Liabilities, Noncurrent [Abstract] Deferred revenues Deferred Revenue, Noncurrent Warranty obligations Other liabilities Other Liabilities, Noncurrent Term loans Loans Payable, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.00001 par value, 10,000 shares authorized; none issued and outstanding Preferred Stock, Value, Issued Common stock, $0.00001 par value, 100,000 shares authorized; 41,393 and 40,856 shares issued and outstanding as of March 31, 2013 and December 31, 2012, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Schedule of potential common shares outstanding that were excluded from the computation of diluted net loss per share attributable to common stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Stock Issuance from Initial Public Offering [Abstract] Stock Issuance from Initial Public Offering [Abstract] Stock Issuance from Initial Public Offering [Abstract] Common stock shares issued from the IPO Conversion of preferred stock into common stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Cost of revenues [Member] Cost of Sales [Member] Research and development [Member] Research and Development Expense [Member] Sales and marketing [Member] Selling and Marketing Expense [Member] General and administrative [Member] General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Allocation of Stock-based Compensation Expense Included in the Consolidated Statement of Operations [Abstract] Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Total stock-based compensation expense Allocated Share-based Compensation Expense Allowances, accounts receivable Allowance for Doubtful Accounts Receivable Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Basis of Presentation, Consolidation and Related Party Transactions Basis of Presentation, Consolidation and Related Party Transactions, Policy [Policy Text Block] Basis of Presentation, Consolidation and Related Party Transactions, Policy [Policy Text Block] Unaudited Interim Financial Information Condensed Financial Statements, Policy [Policy Text Block] Condensed Financial Statements, Policy [Policy Text Block] Significant Accounting Policies Comparability of Prior Year Financial Data, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Employee stock options and restricted stock units [Member] Employee Stock Options and Restricted Stock Units [Member] Employee Stock Options and Restricted Stock Units [Member] Employee stock [Member] Employee Stock [Member] Allocated Share-based Compensation Expense Provision for U.S. federal or state income taxes Current Federal State and Local Tax Expense Benefit Current federal state and local tax expense benefit. Provision for income tax Current Foreign Tax Expense (Benefit) INVENTORY Inventory Disclosure [Text Block]