Geographic Information - Schedule of Sales by Geographical Area (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
| Net sales by geographical area | $ 4,929 | $ 6,212 | $ 10,154 | $ 10,304 |
| Central America [Member] | ||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
| Net sales by geographical area | 8 | 325 | 27 | 420 |
| South America [Member] | ||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
| Net sales by geographical area | 2,225 | 2,307 | 4,171 | 4,174 |
| Caribbean [Member] | ||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
| Net sales by geographical area | 947 | 832 | 1,899 | 1,555 |
| United States [Member] | ||||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||||
| Net sales by geographical area | $ 1,749 | $ 2,748 | $ 4,057 | $ 4,155 |