Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Additional Information (Detail)

v3.10.0.1
Revenue Recognition - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Disaggregation Of Revenue [Line Items]    
Revenue from products and services transferred to customers, percentage 87.00% 85.00%
Revenue from services transferred to customers over time, percentage 13.00% 15.00%
Revenue recognized from contract liability   $ 600,000
Extended warranties recognized   700,000
Deferred royalties recognized   $ 6,000
Maximum    
Disaggregation Of Revenue [Line Items]    
Amortization period to expense incremental costs   1 year