v3.19.1
Geographic Information - Schedule of Sales by Geographical Area (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales by geographical area $ 5,225 $ 4,092
Central America [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales by geographical area 20 95
South America [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales by geographical area 1,945 1,868
Caribbean [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales by geographical area 952 723
United States [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales by geographical area $ 2,308 $ 1,406