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
Mar. 31, 2015
USD ($)
Feb. 28, 2015
Mar. 31, 2017
USD ($)
ft²
Dec. 31, 2016
USD ($)
Commitment And Contingencies [Line Items]        
Area of corporate headquarters and manufacturing facility | ft²     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, 2017     $ 117,000  
Accrued capital lease obligations, current position     117,000 $ 159,000
Capital lease obligation, long-term     0  
Purchase commitments pending     15,200,000  
Employee Arrangements and Other Compensation        
Commitment And Contingencies [Line Items]        
Change in control, if occurs, may require severance benefits payable     1,800,000  
Accrued for performance bonuses     $ 67,000