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 9 Months Ended
Mar. 31, 2015
USD ($)
Feb. 28, 2015
Sep. 30, 2017
USD ($)
ft²
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%
Capital lease prepayment     $ 14,000
Future minimum lease payments under capital lease including net minimum lease payment for year ended December 31, 2017     17,000
Capital lease obligation, long-term     0
Purchase commitments pending     12,800,000
Employee Arrangements and Other Compensation      
Commitment And Contingencies [Line Items]      
Change in control, if occurs, may require severance benefits payable     1,300,000
Accrued for performance bonuses     $ 67,000