Annual report pursuant to Section 13 and 15(d)

Summary of Sales by End Market (Detail)

v3.20.1
Summary of Sales by End Market (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disaggregation Of Revenue [Line Items]      
Net revenue $ 37,799 $ 46,155 $ 46,926
End-customer      
Disaggregation Of Revenue [Line Items]      
Net revenue 25,173 30,478 31,886
Distributors      
Disaggregation Of Revenue [Line Items]      
Net revenue $ 12,626 $ 15,677 $ 15,040