Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 3 Months Ended 9 Months Ended
Feb. 28, 2015
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2015
EUR (€)
Apr. 29, 2014
USD ($)
Apr. 29, 2014
EUR (€)
Commitment And Contingencies [Line Items]            
Capital lease agreement term for information technology equipment 30 months          
Future minimum lease payments under capital lease, net minimum lease payment for the year ended December 31, 2015     $ 32,000      
Future minimum lease payments under capital lease, net minimum lease payment for the year ended December 31, 2016     157,000      
Future minimum lease payments under capital lease, net minimum lease payment for the year ended December 31, 2017     $ 160,000      
Future minimum lease payments borrowing rate     1.64%      
Present Value Of Net Minimum Lease Payments At Inception Of Lease     $ 9,000      
Capital Lease Obligations, Current     142,000      
Capital lease obligation     $ 201,000      
Extended lease term     Apr. 30, 2020      
Provisions for tenant improvement allowance, maximum     $ 398,000      
Future minimum lease obligations, for the year ended December 31, 2015     178,000      
Future minimum lease obligations, for the year ended December 31, 2016     694,000      
Future minimum lease obligations, for the year ended December 31, 2017     651,000      
Future minimum lease obligations, for the year ended December 31, 2018 and thereafter     1,500,000      
Purchase commitments pending     11,000,000      
Litigation Settlement Amount Receivable Non-Current     825,000      
Receivable For Legal Settlements On First Anniversary     275,000      
Receivable For Legal Settlements On Second Anniversary     275,000      
Receivable For Legal Settlements On Third Anniversary     275,000      
Litigation Settlement Amount Receivable Current     550,000      
Litigation Settlement Receivable     1,400,000      
Litigation Expense Recovered   $ 0 731,000      
Settlement Expense For Dismissal of Patent Infringement Lawsuit Recovered     68,000      
Legal settlement at present value     $ 1,200,000      
Foregoing litigation settlement, description     As part of the settlement, Fotona agreed to pay the Company a total of $1.4 million, with $550,000 payable within 10 days of March 24, 2015 and the remaining, $825,000 payable in three increments of $275,000 each to be paid no later than the first, second, and third anniversary of the effective date of the agreement.      
Statutory Bond            
Commitment And Contingencies [Line Items]            
Amount of injunction bond to be posted | €       € 146,000    
Licensing Agreements United States            
Commitment And Contingencies [Line Items]            
License period     3 years      
Licensing Agreements Outside of United States            
Commitment And Contingencies [Line Items]            
License period     5 years      
Settled Litigation            
Commitment And Contingencies [Line Items]            
Deferred revenue         $ 379,000  
Employee Arrangements and Other Compensation            
Commitment And Contingencies [Line Items]            
Change in control, if occurs, may require severance benefits payable     $ 1,600,000      
Accrued for performance bonuses     $ 198,000      
Surety Bond            
Commitment And Contingencies [Line Items]            
Amount of injunction bond to be posted | €           € 500,000