Geographic Information - Schedule of Sales by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	$ 11,624	$ 7,821
Central America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	3,838	4,915
South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	4,627	1,196
Mexico [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	227	106
U.S.-based Latin American distributors [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	1,793	1,450
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	164	151
Europe, Middle East and Africa ("EMEA") [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	928	3
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales by geographical area	$ 47