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 6 Months Ended
Mar. 31, 2015
USD ($)
Feb. 28, 2015
Jun. 30, 2016
USD ($)
ft²
Jun. 30, 2015
USD ($)
Jun. 30, 2016
EUR (€)
ft²
Dec. 31, 2015
USD ($)
Apr. 29, 2014
USD ($)
Commitment And Contingencies [Line Items]              
Area of corporate headquarters and manufacturing facility | ft²     57,000   57,000    
Extended lease term Apr. 30, 2020            
Provisions for tenant improvement allowance, maximum $ 398,000            
Capital lease agreement term for information technology equipment   30 months          
Future minimum lease payments under capital lease, borrowing rate     1.60%        
Future minimum lease payments under capital lease including net minimum lease payment for year ended December 31, 2016     $ 71,000        
Future minimum lease payments under capital lease including net minimum lease payment for year ended December 31, 2017     160,000        
Accrued capital lease obligations, current position     169,000        
Capital lease obligation, long-term     74,000     $ 159,000  
Purchase commitments pending     12,700,000        
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       $ 731,000      
Settlement Expense For Dismissal of Patent Infringement Lawsuit Recovered     68,000        
Legal settlement at present value     1,200,000        
Deferred revenue     $ 3,243,000     $ 3,297,000  
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.        
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     $ 1,400,000        
Accrued for performance bonuses     $ 75,000        
Statutory Bond              
Commitment And Contingencies [Line Items]              
Amount of injunction bond to be posted | €         € 146,000