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 |