Annual report pursuant to Section 13 and 15(d)

Summary of Sales by End Market (Detail)

v3.10.0.1
Summary of Sales by End Market (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disaggregation Of Revenue [Line Items]      
Net revenue $ 46,155 $ 46,926 $ 51,810
End-customer      
Disaggregation Of Revenue [Line Items]      
Net revenue 30,478 31,886 36,060
Distributors      
Disaggregation Of Revenue [Line Items]      
Net revenue $ 15,677 $ 15,040 $ 15,750