Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable, Current Accounts payable Accounts Receivable [Member] Total accounts receivable [Member] Accounts Receivable, Net, Current Accounts receivable, net Amount of certain milestones achieved in account receivable Interest expense incurred, not yet paid, on all other long-term debt, which include interest on long-term notes added to the principal balance of the term loan. Accrued Interest In Term Loan Principal Amount Accrued interest converted to principal balance of term loan Accrued Liabilities, Current Accrued liabilities Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Additional Paid in Capital, Common Stock Additional paid-in-capital Adjustments, Noncash Items, 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: Allocated Share-based Compensation Expense Stock-based compensation expense Amendment Flag Amendment Flag Amortization of Debt Discount (Premium) Amortization of debt discount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive securities excluded from computation of earnings per share Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Arrangements and Non-arrangement Transactions [Domain] Arrangements and Non-arrangement Transactions [Domain] Asia Pacific [Member] Asia Pacific [Member] Asset-backed Securities [Member] Asset-backed securities [Member] Assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Assets, Current [Abstract] Current assets: Assets, Fair Value Disclosure Total Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized gains Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Gross unrealized losses Available-for-sale Securities, Amortized Cost Basis Amortized cost Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss 12 Months or Greater, Gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Total, Gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Total, Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Summary of Investments in Continuous Unrealized Loss Position for Less Than 12 Months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Less Than 12 Months, Gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less Than 12 Months, Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 Months or Greater, Fair value Available-for-sale Securities, Current Fair value Total available-for-sale securities Short-term investments Available for sale securities debt maturities after one through three years fair value. Available For Sale Securities Debt Maturities After One Through Three Years Fair Value Maturing in one to three years Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Maturing in one year or less Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Gain on sale of investments Available-for-sale Securities [Table Text Block] Short-Term Investments Available-for-Sale Securities Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation and Summary of Significant Accounting Policies Business Description and Basis of Presentation [Text Block] Description of Business Capital Lease Obligations Capital leases Cash and Cash Equivalents, at Carrying Value End of period Beginning of period Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value [Abstract] Cash and cash equivalents Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net (decrease) increase in cash and cash equivalents Collaborative Arrangement Disclosure [Text Block] Collaboration Agreement Collaborative Arrangement [Member] Collaborative Arrangement [Member] Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] Commitments and Contingencies Commitment and contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock [Member] Common Stock [Member] 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, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock, $0.0001 par value, 150,000 shares authorized; 18,392 and 18,272 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Disclosure [Text Block] Concentration of Risks Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration Risk, Percentage Concentration risk, percentage Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Corporate Debt Securities [Member] Corporate debt securities [Member] Cost of Revenue Cost of product and service revenue Costs and Expenses Total costs and expenses Costs and Expenses [Abstract] Costs and expenses: Credit Concentration Risk [Member] Credit Concentration Risk [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Current Fiscal Year End Date Current Fiscal Year End Date Customer Concentration Risk [Member] Customer Concentration Risk [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Long-term Debt and Obligations Debt Instrument, Frequency of Periodic Payment Principal and interest payment frequency Debt Instrument, Redemption Price, Percentage Percentage of redemption fee Payment-in-kind percentage as agreed upon in the financing agreement to defer interest payments. Deferred Payment Obligation Accrued Interest Rate Percentage of deferred payment Deferred Rent Credit, Current Deferred rent, current portion Deferred Rent Credit, Noncurrent Deferred rent, net of current portion Deferred Revenue Deferred revenue recorded under collaboration agreement Deferred Revenue, Additions Collaboration agreement upfront payment Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Axis] Deferred Revenue [Domain] Deferred Revenue [Domain] Deferred Revenue, Current Deferred revenue, current portion Deferred Revenue Disclosure [Abstract] Deferred Revenue Disclosure [Abstract] Deferred Revenue, Noncurrent Deferred revenue, net of current portion Depreciation, Depletion and Amortization Depreciation and amortization Document And Entity Information. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share, Basic and Diluted Net loss per share - basic and diluted Earnings Per Share, Policy [Policy Text Block] Net Loss Per Share Earnings Per Share [Text Block] Net Loss Per Share Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate changes on cash and cash equivalents EMEA [Member] Europe, Middle East & Africa [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Incorporation, Date of Incorporation Date of incorporation Entity Incorporation, State Country Name Place of incorporation Entity Registrant Name Entity Registrant Name Equity Component [Domain] Equity Component [Domain] Extended Product Warranty Description Extended warranties description The extended product warranty liability period. Does not include increases or decreases in the standard warranty liability. Extended Product Warranty Period Extended warranty period 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] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, by Balance Sheet Grouping [Table Text Block] Company's Available-for-Sale Securities by Level within Fair Value Hierarchy Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Gains (Losses) on Extinguishment of Debt Loss on extinguishment of debt Guarantees [Abstract] Guarantees [Abstract] Income Statement [Abstract] Income Statement [Abstract] Increased Annual Revenues Increased Annual Revenues Increase in annual revenue in fiscal years Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Accrued Liabilities Accrued liabilities Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Inventories Inventory Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other Increase (Decrease) in Restricted Cash Decrease in restricted cash Interest expense incurred, not yet paid, on all other long-term debt, which may include (1) interest on long-term notes, and (2) amortization of issuance costs not otherwise separately disclosed. Interest Accrued On Long Term Notes Interest accrued on long-term notes Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Inventory Inventory, Finished Goods, Net of Reserves Finished goods Inventory, Net Inventory Inventory, net Inventory, Raw Materials, Net of Reserves Raw materials Inventory, Work in Process, Net of Reserves Work in process Investment Income, Interest Interest income Investment Income, Investment Expense Interest expense Investment Income, Net, Amortization of Discount and Premium Net amortization of premium on short-term investments Investments Classified by Contractual Maturity Date [Table Text Block] Fair Values of Available-for-Sale Securities by Contractual Maturity Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Short-term Investments Liabilities Total liabilities Liabilities and Equity Total liabilities and stockholders' equity Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Line Credit Facility Additional Borrowing Capacity Line Credit Facility Additional Borrowing Capacity Credit facility, additional borrowing capacity Long-term Line of Credit Credit facility, Outstanding Line of Credit Facility, Current Borrowing Capacity Credit facility, borrowing capacity Line of Credit Facility, Expiration Period Credit facility, expiration period Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of Credit Facility, Maximum Borrowing Capacity Credit facility, borrowing capacity Line of Credit Facility [Table] Line of Credit Facility [Table] Line of credit maturity month and year. Line Of Credit Maturity Month And Year Credit facility, maturity date Loans Payable Term loans payable Long-term Debt Long-term debt Long-term debt Long-term Debt, Current Maturities Long-term debt, current portion Less: Current portion Long-term Debt, Maturities, Repayments of Principal after Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2016 Long-term Debt, Maturities, Repayments of Principal in Year Five 2019 Long-term Debt, Maturities, Repayments of Principal in Year Three 2018 Long-term Debt, Maturities, Repayments of Principal in Year Two 2017 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2015 Long-term Debt, Excluding Current Maturities Long-term debt, net of current portion Non-current portion Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Percentage of accrue interest Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Maximum [Member] Maximum [Member] Date in which the Payment-in-kind interest percentage as agreed upon in the financing agreement becomes due. Maximum Period Of Deferred Payments Of Interest End of deferred payment term Minimum [Member] Minimum [Member] Money Market Funds [Member] Money market fund [Member] Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Financing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by (used) in investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Investing activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Operating activities Net Income (Loss) Attributable to Parent Net loss Net loss New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Nonoperating Income (Expense) Total other income (expense), net North America [Member] North America [Member] Represents the number of major customers who meet the identified concentration risk threshold of 10%. Number Of Customers Meeting Concentration Risk Threshold Number of customer that individually represented more than 10% of total revenue and accounts receivable Number of Reportable Segments Number of reportable segment October 2014. October Two Thousand And Fourteen [Member] October 2014 [Member] Operating Income (Loss) Loss from operations Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Other Assets, Noncurrent Other assets Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Change in unrealized gain (loss) on short-term investments Other Income and Expenses [Abstract] Other income (expense): Other Nonoperating Income (Expense) Other income (expense) Other than Temporary Impairment Losses, Investments, Available-for-sale Securities Investments that were other-than-temporarily impaired Payments to Acquire Available-for-sale Securities Purchases of short-term investments Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Represents the method (vendor-specific objective evidence, third-party evidence, estimated selling price) used to establish the selling price of the significant unit of accounting for allocation of the consideration of the multiple-deliverable arrangement. Percentage Used To Determine Discount For Standalone Sales Percentage used to determine discount for stand-alone sales Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, shares issued Preferred Stock, Value, Issued Preferred stock, $0.0001 par value, 15,000 shares authorized; none issued Prepaid Expense and Other Assets, Current Prepaid expenses and other Proceeds from Issuance Initial Public Offering Proceeds from public offering Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Proceeds from issuance of common stock for employee stock purchase plan Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from maturity of short-term investments Proceeds from Sale of Available-for-sale Securities Proceeds from sale of short-term investments Proceeds from Stock Options Exercised Proceeds from exercise of stock options Product Warranties Disclosures [Abstract] Product Warranties Disclosures [Abstract] Product Warranty Accrual Warranty reserve, Ending balance Warranty reserve, Beginning balance Product Warranty Accrual, Payments Cost of warranty claims The period of accrual amount as of the balance sheet date of the aggregate extended product warranty liability is amortized. Product Warranty Accrual Period Product warranty accrual period Product Warranty Accrual, Warranties Issued Warranty accrual Product Warranty Disclosure [Text Block] Reserve for Product Warranties Property, Plant and Equipment, Net Property and equipment, net Range [Axis] Range [Axis] Range [Domain] Range [Domain] Recognition of Deferred Revenue Collaboration Revenue recognized under collaboration agreement Final payment of the credit facility term. Repayment Of Term Loan End of term payment Lump-sum payment that becomes due under a financing agreement when repayment occurs before the stated maturity date. Repayment Of Term Loan Premium Amount of make-whole premium payment Total final amount due per terms of the financing agreement. Repayments Of Borrowings Under Credit Facilities Total incurred and recorded repayment Repayments of Long-term Debt Repayment of long-term debt Research and Development Expense Research and development Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Restricted Cash and Cash Equivalents, Noncurrent Restricted cash Retained Earnings (Accumulated Deficit) Accumulated deficit Revenue from External Customers by Geographic Areas [Table Text Block] Classification of Revenue by Geography Revenue Recognition, Milestone Method, Description Annual revenue recognize description Revenue Recognition, Milestone Method, Revenue Recognized Annual revenue requirements Maximum success-based milestone payments Revenue Recognition, Policy [Policy Text Block] Revenue Recognition Revenues Total revenue Total revenue Revenues [Abstract] Revenue: Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Risks and Uncertainties [Abstract] Risks and Uncertainties [Abstract] Revenue, Net Product and service Sales Revenue, Net [Member] Total revenue [Member] Scenario, Forecast [Member] Scenario, Forecast [Member] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Outstanding Options and Warrants were Excluded from Computation of Basic and Diluted Net Loss Per Share Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table] Schedule of Debt [Table Text Block] Components of Borrowings, Including Current Portion Schedule of Inventory, Current [Table Text Block] Schedule of Inventory Schedule of Maturities of Long-term Debt [Table Text Block] Scheduled Future Principal Payments under Outstanding Debt Obligations Schedule of Product Warranty Liability [Table Text Block] Schedule of Changes in Company's Warranty Reserve and Related Costs Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Domain] Geographical [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Information about Geographic Areas Selling, General and Administrative Expense Selling, general and administrative Extended line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] A summary of information pertaining to the Basis of Presentation and Summary of Significant Accounting Policies disclosure as a whole for which no other established gaap taxonomy identified hypercube is available. Significant Accounting Policies [Table] Significant Accounting Policies [Table] The standard product warranty liability period. Does not include increases or decreases in an extended warranty liability. Standard Product Warranty Period Standard warranty period Equity Components [Axis] Equity Components [Axis] Geographical [Axis] Geographical [Axis] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Scenario [Axis] Scenario [Axis] Stockholders' Equity Attributable to Parent Total stockholders' equity Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Equity Option [Member] Options to purchase common stock [Member] Straight Line Rent Deferred rent Subsequent Event [Line Items] Subsequent Event [Line Items] Subsequent Event [Member] Subsequent Event [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Description of whether outstanding balances under the short-term credit facility will be or were transformed into a long-term borrowing arrangement, and indicates when that is expected to occur or when it did occur. Term Loan Facility [Member] Term Loan Facility [Member] Trading Symbol Trading Symbol Type of Arrangement and Non-arrangement Transactions [Axis] Type of Arrangement and Non-arrangement Transactions [Axis] Up-front Payment Arrangement [Member] Upfront Payment Arrangement [Member] UNITED STATES United States [Member] US Government Agencies Debt Securities [Member] U.S. government-related debt securities [Member] Warrant [Member] Warrants [Member] Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted average shares used in computing basic and diluted net loss per share